I thik this could be good
This has alot of potential, so i will point out some things that you should fix.
1st: Make a variation of enemies, only one is kind of dumb
2nd: Make the buy screen more inviting, because right now you can't really see the credits that you have, and the weapons thing is all weird.
3rd: Make it so that you can actually read the introduction
Fix it, then PM me and i will give it a 5/5