This was more addicting than I was expecting, considering the simplicity of the game. The upgrades come in large amounts though, and each shot/weapon seems to have a real impact, moving the screen a bit, battering the target, causing overall carnage and mayhem. Even though the main 'character' isn't even a living thing it was a lot of fun, keep it going!
-cd-
I certainly had fun with it for a while :) Definitely nice graphics, too.
I completely agree with the comments about the difficulty curve, though. It starts out nice and easy, but later on enemies get powerful very quickly while my own upgrades seem to lag behind - enemies takes a lot of shots to die even at maximum damage, the combat bot seems to be just an additional (and weaker) cannon, landmines have a limited number and don't kill anything in one blast, not to mention enemies which stand outside the mine range and shoot... (but the mines do blast air enemies). I only have one weapon and enemies aren't too varied. Plus, listing enemies under Achievements was confusing, especially when there's a new one but it's not specified what it is at all...
Good game only problem is if you do not go back to the menu it does not save, and if your flash crashes you lose all progress from the last time you went back to the menu.
I simply can't get past wave 21, the enemies are too overwhelming. Otherwise great game. I sugest you make the airstrike to be used more than just once per wave.
EDIT: I revisit this game after 9 years and I finally beat wave 21 after who knows how many tries. XD
Very frantic ideed. Love that you never feel on top of the situation. Very addictive gameplay. Good effort !! :-)