Hey, thanks so much for playing and for the feedback!
Yeah, the game is not really balanced well for later levels particularly, and there's not nearly enough content to keep things interesting for very long.
I ended up suspending work on this version for a while, but I'm now in the process of rebooting it from scratch with some new structure (for instance, with a resource cost for playing cards so you don't get stuff like toolbox where there's no reason not to play it). If you're interested, I can send you access to a build when it's in a more testable state (it's still in a pretty early stage but it's getting there, maybe in a couple weeks or so), I'd love to get your feedback on it!