I really really like the background art, it's awesome. One thing I didn't realise on the second level was that the first of the two jumps I could do didn't need to be off of a platform, so I was stuck there for a bit but not too long as I eventually figured it out!! I wouldn't say this is a problem, just something I noticed, but if you spam through the weapons while shooting, the green gun mixing in with the others deals so much damage! it makes the fights on the ground much easier! One other thing is that the character kinda walks off the platform a little after they are off the platform.
I loved the game! this is awesome!