Thanks for playing!
In regards to your feedback,
1 - yeah, totally agreed, i couldn't work the whole 4 days so some things came out a bit short
2 - some of them do, the polyphonic ones shoot more than one bullet and on all notes the damage is different. Explosions and speed would be a great deal of fun (especially considering the lots of enemies you mentioned), haven't thought about that. Noted!
3 - Yeah, sorry xD
4 - If you mean it in relation to the guitar tracks, the browser export has some timing fluctuations that I still need to investigate (that makes the riffs a little sloppy too depending on the run). If you meant stiff as in "it doesn't change much", yeah. I did have plans to insert drum fills periodically but unfortunately couldn't make it on time
Really valid and constructive feedback, I appreciate it a lot! :) Thanks again