I'll make a list of all my thoughts as I play.
1. The actual hitbox on the target minigame is very unclear
2. I also don't know the purpose of the games either.
3. Along with some polish in the UI, some explanatory dialogue would go a long way.
4. For example, I didn't realize the characters lose clothes as they level up. It was a pleasant surprise since I thought the only NSFW content was the gallery.
5. The income scaling to get to lvl 100 is not very balanced. The final upgrade on the Rogue costs 3453T, when she only brings in 100T/s. Considering the only thing to really spend your money on is upgrades to get to lvl 100, this is pretty slow. It only gets worse as the characters go on.
The art already makes it better than majority of the game coming out these days, but the game design has a long way to go. That can only get better by creating though, so I look forward to seeing what else you put out.

