Here's my suggestions to why this is so crappy
First of all the drawings were poor Dob doesn't even look like an alien to me. looks like an L spelled backwards. second of all the diffculty, when you try to go past that boss thing you died. You can't even go thorough cause he's SLOW. plus the music was way too loud. you could've added a sound and music button to adjust it. where did you get that background from?
These are my suggestions, read them and comment back or PM me for a response.
Weapon2