Welcome to Carbon-izer's Bugdom strategy guide! The maps here were originally made by Pangea for their strategy guide, however, they have been souped-up with additions and clarifications to make them easier to understand, including fixing an error on Level Four. I also have slightly different takes on strategy. This also assumes some familiarity with the game (what items are, the straws are, etc.). I wouldn't certify these as printer-friendly due to the map for level six, but I might make a new version if asked.
Level One: Training
This is the first level of Bugdom and gives the appearance that is an extremely easy game. There are some keys and locked doors (the keys are nearby), there are some enemies that the Pangea strategy guide recommends avoiding, but trying to avoid them just means they'll keep following you, so try to take out as many as you can without losing too much health. ("Running away" isn't the best advice because there are swarms of enemies in later levels that you can't avoid and you'll have to use discretion).
It's tempting to use the ball form to zip around but your supply of that is limited and in later levels you can lose control very quickly. Just learn to walk everywhere.
Level Two: The Lawn
The Lawn is a souped-up version of the first level. It introduces water as a mechanic, but you won't be swimming around much in the rest of the game, the third level introduces fish that makes swimming extremely dangerous, and after that there's no more water in the game. Still, nothing too hard yet. Be sure to grab the gold clover piece, there's only four of those in the game.
Level Three: Pond
This is the only water-based level in the game and gives a feel like they might've wanted to expand this concept but nothing else is like it (the fog, the music, the tokens, everything here is unique to this level). Here, you must collect tokens for the water taxi. It's also the only levels with mosquitoes, which suck the ball time (not health) from you. The only threat are the fish, which don't affect you on the water taxi but are extremely dangerous—hard to avoid and will snipe an entire life from you.
Level Four: Forest
This is an extremely difficult level compared to the previous three. The feet are seemingly random. The developers say there's a pattern to it and to learn that pattern but the distance fog make this almost impossible and they'll still drop in almost randomly with little warning.
It also introduces dragonflies as a concept. The Jorio port gives the option of inverted controls for the dragonflies, but they're still difficult to control. Learning how to fly them at least adequately is necessary for the next level, though at least they have cannons.
In the second half of the level there aren't any more feet or any collectibles, but stay close to the ground as you are at the tree line. Spiders are a threat, but you can tell that they're about to drop down from the shadows, so they at least have a tell.

Level Five: Aerial Attack
There's no map for this one, but there are still three Ladybugs to free. One is on the perimeter circle, the other two are closer to the ground, with one of them being directly below the hive. In addition to the bees that will emerge from the hive as you start firing at it, be ever aware that the bat will say hello if you go too high. Sadly, this is the last dragonfly level and the next-to-last overworld level.
Level Six: Bee Hive
This area is crawling with bees, and while the larvae are fun to squish, the others won't go as easily. Luckily, they commit suicide via their stingers firing, so in this outrunning is a good idea. The honey is by far the biggest threat here, and the red platforms will sink. Don't roll, either, especially as the cracks in the wall seem like good shortcuts, but they aren't and you may get stuck.
A few other things to keep in mind--the area where I marked, every single walnut holds an enemy inside, and I didn't get far enough to get the last key and see what the color is. This is also a gold clover level, so don't miss it.

Level Seven: Queen Bee
The Queen Bee can only be taken by rolls, but the black parts in the floor are spikes. There are blue clovers here (check the perimeter). There might also be a bug that I found where after supposedly losing all her life, the Queen just sort of hovered in mid-air, safely out of reach. In that case, you should start this level over.
Level Eight: Night Attack
This level is very large but not that difficult to navigate. A few notes though:
- The fire ants are not to be trifled with, so zoom past them.
- There are numerous pits with the poison ooze (marked in green), but in ball form you should be able to bounce right over them.
- Fireflies (marked with an "X") WILL go after you if you're in their area, even if you're in ball form. In particular, get the gold clover and get the heck out of there.
- The last big area I didn't map properly. Most of the rest of the ladybugs are here on tall ridges (the pits are filled with fireflies). I think I still missed one. There *may* be one in the last section.

Level Nine: Ant Hill
Once again, there are a few gimmicks that are on this level and no other levels as you're almost done, including rope swinging over lava (would've been nice for them to give you practice on something easier) and fire (which, despite easily being extinguished by water valves, is instant death if you touch it).
Of special note is the last gold clover, you'll have to kick the walnuts there FIRST to find an invincible shell, move to the left, kick the walnuts, then get out. Once you flood the area it will be impossible for you to get it. If you want to get all the ladybugs without cheating, it's extremely difficult. The red ants are everywhere and there's many things that will just straight up kill you. Luckily, this is the last real challenge.

Level Ten: Ant King
Relax, this guy is a pushover, just don't start upsetting the other red ants and be mindful of the magic beam he shoots out sometimes. He's invincible until water hits him, and then you can roll around or kick him (he won't take damage until he stands up again). 12 hits ought to do it. There's a number of goodies in the rest of the level like another life or invincibility, but no blue clovers. And that's it! You win! Due to a finite number of green clovers and no bonuses for enemies and time, there's a maximum score (reportedly around 225k).