Overall: Since there's a list for 5 songs that keep a record of your highest combo with that song, I wish the different songs had different objects in their respective stages. All of them being identical was a bit disappointing. I like the gameplay, and the visuals are over the top, but it felt a bit empty. I do however sincerely appreciate the pause menu and volume sliders.
Fun: I think this game needs more variety. Since it only has one stage, with one type of enemy, it gets stale fast. Perhaps adding some ground enemies, or enemies that combine into a snake formation could spice it up.
Innovation: I can't think of many places where this game does something new. Maybe the song select?
Theme: I really don't think this game fits the theme. The "Combo" is more of a kill tally, as you don't really lose the combo for missing or anything. And the combo has no effect on the gameplay.
Graphics: I love the neon aesthetic! The 3d models are impressive too! I think the explosion particles get in the way a little bit, and they really clutter up the screen. There were definitely times when so much was on screen I couldn't even see my own attacks.
Mood: I'm really unsure what kind of mood you're going for. The visual scream Retro 80's neon vibe, but the music is completely unrelated.
Audio: I think it was an odd choice to let the player pick a song from a list. On top of that, I wasn't a huge fan of any of the songs. They didn't seem to fit the visuals in any way. I was expecting more retro synths to match the neon aesthetic. The music was well made and balanced though.
Humor: Not Applicable.
Final Thoughts: I just wish there was more. It's crazy that it keeps track of your score across 5 different "levels" and yet they are all the same level. There's only one type of enemy, and I can only shoot one type of gun. It's definitely a prototype of something that could be much bigger. According to the description, you were going for a "crazy time", and I think it could be a lot crazier with some goofy additions, like a grapple hook, or a jet pack, or bombs, or a minigun, or a spider-enemy that jumps around... I could go on. I think too much effort was put in the music, and not enough on the gameplay.