This was fun and well-designed for the first four levels, but now it's just irritating. X-P I keep dying at the scary gate due to the overpowered boss, plus it's borderline impossible to place stuff to block an enemy's way if they're on/at the tile (such as placing a mine under them). This has a lot of potential, but really needs some tweaking.
Things seem kinda random...As if, sometimes, I just dash at a bunch of enemies and kill them all (none at my back), and, other times, I do the same thing and get creamed. Music, graphics, and concept are all really cool. If this had a story/ending, I'd really like it.
The audio and music "mute" buttons just lower the levels to zero. Click on the audio or music volume bar to raise the volume again. I didn't consider a toggle option, but I'll put that on the enhancements list for pending future updates.
Uh, is the floor supposed to fall when you step on the tires/circles at the end of the first level? :-P Anyway, good start. Simple but nice. Upgrades will be nice to have, and be a good idea if coins "stacked", at least a percentage, so that, if you fail a level, you get something for it.
Oh, forgot to mention: multiple perks should be able to run at once. I would pick up the invincibility perk while running the repair one, and it would turn the latter into a super short (the repair's remaining time) and worthless upgrade. :-P
 "Missile Defense"){kind=icon}
 "SPACECRAFT CRUSHER"){kind=icon}
 "Super Monkey Boy"){kind=icon}
 "Rogue Drop"){kind=icon}
 "Fox Little Traveller"){kind=icon}
 "Doodle Brigade"){kind=icon}
 "Rage Blade"){kind=icon}
 "The Enchanted Cave 2"){kind=icon}
 "Let's Run!"){kind=icon}
 "Build and Attack 2"){kind=icon}
 "Monster Crusade"){kind=icon}
 "Caveman Escape"){kind=icon}
 "Mad Day"){kind=icon}
The audio and music "mute" buttons just lower the levels to zero. Click on the audio or music volume bar to raise the volume again. I didn't consider a toggle option, but I'll put that on the enhancements list for pending future updates.