I don't see how this work with your theme but this is kinda fun to play, even if some things feels a bit jumpy (like @Houkime said).

Need more noticeable feedback on death - like red color flash or sth. Hard to notice when you die.

The mechanics of bullet interaction feels vague. Sometimes you die from bullet, sometimes not.
If it depends on your size probably some indication that bullet hit n shrank you like sound or sth. Size changes are not really that noticeable by themselves and probably shouldn't be used as the sole indication.