This game is one of my favorites and I have a few suggestions.
First, I think that there should be flies in this game, and that they would be like a higher level bee. They would be neutral, but will attack you on sight in the garbage heap like the bees at the picnic table.
I think you should be able to tame all neutral bugs, and ride some like bees, roly polies, fire flies, and so forth.
Another boss should be a lizard or toad, that is the last boss in progression. The lizard could be under the sandbox, and the toad could be in a wet cavern in the Moldorc Highlands.
There should also be a fire ant queen boss that when killed, drops some sort of liquid to make a armor to neutralize and tame fire ants. The armor can control at least twenty ants at once, so you can have your own small fire ant army. The armor does not have a lot of defense however, and by using toad, or lizard scales, will make it reinforced and have more defense.