very thank you for playing the game!?
Every last stage was an ice level! Ever heard of friction!? Also, they aren't upgrades if you can't control them! When a user stops pushing the jump or attack button, the sprite should stop its attack or jump acceleration!
Even if you want to do crappy physics, at least beta test! The user should not be able to die after winning the stage, and if he does, he sure as hell better be able to click the retry button instead of having to close and reboot the game.
And what's with the labeling on the upgrade menu? Main Menu? You've already made it clear that the main menu is the one at the title screen, just label it "return" it's less confusing.
The SFX are worthless. The same sound is used for character death, enemy death, and machine destruction? and it's a whistle!? And that same damn song, you seriously couldn't change the theme every 10 levels or so?
I know this took some effort, and I'd give you a star for it, but I know you won't learn from this because your English is pitiful, as evidenced by your victory message.
Very thank you in advance for fixing the game.