Thank you! I've never played Undertale, but I'm not too surprised that my game reminds you a bit of it, considering it shares a common source of inspiration (東方/Touhou). As for the difficulty, I didn't take the time to give the game a full play through, so it was mostly just guesswork. I personally find the first 200 or so seconds of the game to be kinda boring, which is a lot more than should be allowed