Hey thanks a lot for your feedback! That are some points I didnt get before so thats very valuable for me.
I tried out your game x minute hero and I will give you some feedback as someone who has played quite a few of games like this and has kind of got bored of them.
The problem with these games is that there are a lot of them out there, so it will be hard to sell yours if you want to make some money from it. What I like about these type of "vampire survivor"-like games is that you can just relaxfocus on building up your character.
The nine vertical upgrades for your stats felt rather too complex to me, as it slowed down the gameplay too much due to the time spent looking at all these stats and thinking about what to get next. There were too many decisions to make. However, I liked the horizontal upgrades, such as explosions or having a shotgun as your weapon.
Once again, it would be really hard to impress me as someone who has played a lot of these kinds of games. I recently played a game called TerraTech Legion, which included a twist. You could basically build your own character instead of just clicking to get a horizontal upgrade with a UI. Perhaps you could include something like this to spice things up a bit.