Your game is fun and looks great. I had a couple ideas for you though.
There seemed to be a lot of empty spaces. I know this is a random game but it's more fun if I can collect more items :)
For me, collecting stone and wood was difficult in that I was not once able to collect enough to upgrade my sword. Maybe it would be possible to trade in two of one resource for one of another at the store?
Health didn't last me that long. I don't know that I ever made it past level 5 (not being able to upgrade the sword was a huge part of that). Since the game is unending (except death) maybe you change it to buy 2 hearts in stead of one? Getting to a higher level will give a better sense that I actually made it somewhere.
Keep up the great work! I like what you have done so far and I can't wait to see some of the additions you've mentioned in game.