It's great to see another Tower Defence game in the jam! I enjoyed this a lot. I liked that you had a couple of towers to select from and that you could upgrade them multiple times. I suppose similair to my game, I found the first couple of rounds quite challenging (nearly lost all my candies!) but later rounds I seemed to scale up my pumkins ALOT and it became much easier. I have no idea how many rounds I did - but I played for a while.
Things to consider: It was very difficult for me to work out where I could and couldnt place a tower, and a few of the spots didnt really seem to make sense. Also if there were pumpkins that dropped behind a tower that I tried to click out, it would bring up the tower upgrade menu which made it hard to get the pumpkins. Mechanically though this is a very sound game. I enjoyed your choice of music and I appreciate the effort required to make a game like this, so great job!