Is it just me or dod the enemies look like Logitech Air mice? =P
But nice job on making this. I would love to make one too, just can't seem to find the time to do so =(
To everyone who is complaining... get headshots on them all... then the only complaining is how few stickguys come out at once. If you're headshot % is low - get the cheap dmg upgrade. Then at least you will be killing them in 2 shots max.
The bosses are fine. The Flyers were more annoying since they came from all angles... But overall the game's pretty easy. Finished with 1 flying elephant getting through.
a10712851 - See the combo tutorial.
Short version - a black hole appears on the path and sucks everything into it.
I don't think you are allowed to use it because you could just send like 15 waves and no matter how much HP the creeps have, they would just be sucked in =D