I love the game! It's addictive, and the upgrades help a lot.
Bugs: Sometimes, when you try to get a green point for healing, you just push it and don't grab it.
Improvements:
Maybe try to optimize it a little more so it's not 1 gigabyte.
Show the controls at any time somewhere on the screen, like in a corner.
Enjoyment Part:
I love the game, as I said, it's addictive.
I love the sound and animation.