heya! almost forgot to leave my comment here, but i have decided to try this game out since someone told me to check on it! :P
i'm not that good on stuff like bullet hell, especially since i can get overwhelmed by it. either way, so far i feel like this prototype reflects that you have some good ideas yet don't have the time to actually add a lot more and polish it.
- the light slot mechanic is super interesting, the only issue i had is in terms of ergonomics. i tend to keep pressing e instead of r, which in turn leads me to just use defaults throughout. i do notice e does something, but its kinda just there? idk what happened ^^;
- oddly love the aesthetic you were trying to go for. genuinely wished you had the time to get it done because the goal you had seems super clear. (this is kinda a similar thing to what someone else said in the comments)
- love how the bosses all have their own mechanics. it does take a wee bit of time for me to get through stuff, but again that's kinda just my issue. it still has a good enough difficulty scaling for someone like me to get somewhere at least.
anyways, i think that is most of what i have to say!! happy to have tried this out :]