Nice game, nothing really new as far as TD games go, but solid and well made, plus nice graphics. 4/5 stars easy, a double speed toggle would have made it a 5.
The difficulty levels scale well, and the towers are a good mix of cost vs power and numbers vs upgrade potential, it definitely provides for a number of ways to come at it. Only suggestion would be as said before, add a double speed toggle or something to speed up the rounds.
Was a fun little game, heres a tip, get the upgrade that makes you use less feul, the agility to turn faster, and then super booster, after that, the rest is up to you, but those 3 will get you furthest. Then once your maxed on those 3, get the speed one maxed, and you can basically hit enter and walk away and win.
so yah, no lives system, so I just send every wave at once right away, build a flamethrower, and upgrade and build more, and walk away for a while come back upgrade, repeat, the game was done in like 10 minutes, and it was no challenge whatsoever, gotta work on it man, but you got the basics down ok, keep tryin dude.