Here’s the bonus boss for world 4!
That’s half of them drawn now. What do you think of them so far?

Well this seemed like quite an obvious choice for a bonus boss.

This one will probably be easier than the original, since it’ll appear in world 2, where as the Hovertank appeared in world 7.

I haven’t decided what the unlock condition for bonus bosses will be, but chances are you’ll be able to play many of them before the original versions.

Got some awesome fanart from ShukoTsuzuki

(You should click it for the full size image!)

Upgraded the turtle for the lava world.
He’ll still have water-like patterns, but this time it’ll be lava instead!

And yeah, the bonus bosses will be found in different worlds from their original, and will mostly play like completely different bosses.

Here’s the bonus boss for the forest world.

He’ll shoot out flower-themed patterns and stuff.