Tutorial was really polished. The music fit the game nicely as well. I do like the concept the game has of protecting your crops it has quite a bit of room for expandability. Sadly I didn't manage to get very far as the pacing was really slow. The path size felt to small and speed of enemies to slow. Some troop options would be cool to.
EDIT: ALSO I forgot, in the future you should consider changing your upload format, a zip folder or even web build is likely to get more plays.