Very cool incremental format pure defense TD. A little overtuned with how difficult the waves are. I hit some friction and plateaued on my income progression to unlocking the tree, and it didn't seem I had much of a chance to progress further. Nonetheless, really enjoyed it so far! It has a really good game loop. So far, i haven't reached the boss, but I unlocked a few tiers of the skill tree.

Overall, I think your game has potential, but you should consider baking more feedback into the game loop. I didn't realize I was dying until I read one of the other comments here, and I was also confused by the upgrades after restarting. A message, "you died" visual or other sound effect would have really helped contextualize what I was seeing.

Yes, this is a cool concept. I noticed the same bug that the others have mentioned. Also, is there a game over? I don't think I even died.  This is still a good game.

Interesting Project. It would have been helpful if there was better information on how to play and what the upgrades did.  Maybe a small write-up might not be a bad idea?

I noticed a bug: Your 'money' is always displayed at 1 when you start a new round, regardless of how much you carry over.

You 'might' also be pleased to know that I played this on a Windows XP system and it did play.  The only downside was after 10 minutes or so, my CPU was running at over 90%.  I think it has to do with the engine you used.

it's cool

Cool little roguelike, good job.