Fun game! Your gameplay loop is really nice and feed into itself very well, but I think it could afford to get more difficult as time progresses. I'd also like to see some sort of tooltip on the pumpkins to see what they do as it took me a little bit to figure out some of them. It's a really good base game though, kept me hooked for quite a while!
One last thing, I think I encountered a bug: not sure how it happened but my second run I couldn't die - I dropped to 0hp and attacks just didn't do anything, I was still alive.