Under rating threshold (hideshow)
UFO can Move through Solid object hiding where you can never hit them took me 10 mins to kill one because it wouldn't quit hiding. Laser Guys ARE WAY OVERPOWERED for this early in the game, and based on the comment it doesn't balance out later. 2/5 rebalance and it could get as high as a 4.
Under rating threshold (hideshow)
Have to agree with Tasker here, the last level is pretty much recockulous. Too many laser guys that are almost undodgeable, too much random crap that WILL mess you up badly before the boss - I can't even get TOO the boss much less beat him. Game overall has major balance issues, also a lot of things like coins disappearing too fast, falling through the world, things shooting you through walls or after they are dead (yeah you laser guys.) This needs a lot of polish before it's what it should be.
Under rating threshold (hideshow)
There is a lot of stuff I like about this game but it is overshadowed by what irks me. First of all, disappearing coins mechanic doesn't work in a game where your hitbox and the enemy projectiles are so large. Second, enemies that can back out of the screen and not take damage force you to hope they walk back into the screen. Finally, weapon upgrades that cost as much as the next weapon makes it so most players won't ever upgrade lower level weapons.