I get what you mean.
I think maybe the story wasn't enjoyable because we didn't really flesh out the idea much. The dialogues are a bit crude and mechanical. Plus it doesn't help that it probably takes an average of 1 hour to beat Utsuho, due to the poor balance.
I agree wholeheartedly with the limited strengths issue you have bought up.
Which is why I'm happy to tell you that we've been working on a 2nd version of the game, addressing all the things you mentioned. There are actual iframes (that was apparently bugged lmao), a Touhou-style hitbox, the classic bomb, and a special passive effect. It will be released soon (Will be announced on discord))
And honestly, man/woman, kudos for even reaching Sagume. Either you put in a shit-ton of time, which I am so happy to think, or you are a god gamer, which is pog.
Thank you very much for your valuable feedback :) I truly appreciate it.