Thank you very much for your long feedback :)
First of all I'm really happy that you were able to enjoy my game for such a long time! For a solo dev 7h of playtime is more than I wish for (and the game isn't even finished!).
Apart from Stage 1, I haven't balanced the game much. Also difficulty systems are planned (probably similar to most games: play on difficulty 1 to unlock difficulty 2 etc.)
I might increase the Tutorial in the options menu with more details, but I feel like too much telegraphing might stop people from exploring / experimenting.
A story is always hard in roguelikes with gameplay focus and I'm also a beginner in story telling. The AI art doesn't make it easier (imposing more limits). I would prefer to have hand drawn art as well, but I don't have a budget for it and sadly no time to draw everything myself. Maybe I will replace it one day myself (but no guarantees that it will look good/better).
Time will tell how it will look like when I'm completely done with it!