I played this game for like 2 hours, so much fun.
There are def some balancing issues however. the healing enemies can be excruciating to fight if you can't kill them in one hit, there were one or two times I had to restart because I was fighting two and couldn't deal more then they healed. There were also some runs where I just went through the map way too fast and never landed on any upgrades or shops.
But the fact that I kept playing for so long speaks to how fun this is. I can for sure see this being expanded into a bigger game.