Thank you! I'm glad you enjoyed the game! And congratulations to beating it. :)
Yes, Dani and Bence struggled with it during their stream yesterday, so it helps a lot if you already know what not to do. :D
Indeed, the strength upgrade is the most effective for beating the game, and of course, the rarer luck isn't bad either. But it mostly depends on randomness and how lucky we are in a given run. For a greater challenge, there's the skip option under each upgrade. :D
I didn't include more enemies because I was saving some for later...
I also wanted to have enemies that get stronger within a level (if you don't finish within a certain time), teleportation, and enemies that move more frequently, but I ran out of time.
Originally, I wanted to add a little story as well, but I had absolutely no time for that either...