I keep coming back to this game so often when I have downtime. It has really good potential. A stats menu or something similar would be nice to have so you can keep track with what "build" you're going for, or what upgrades you're behind on in general. Just speculation, but it looks like you can go past 100% crit chance? That could be fixed so it frees up an upgrade card slot.
I have more fun than I should with this beta. I hope it keeps getting updates.