Amazing game! I had a lot of fun playing. Reminds me a lot of online flash(rip) games I used to play. Wonderful artstyle and I really like the upgrade tree.
Some very minor issues:
- The upgrade progression is a bit too slow. Getting all of them would probably take 1,5-2h of playtime
- The golem's hitbox does not match the sprite (it's too far in front of him)
- The secondary plants seemed to have no purpose (?). I couldn't keep watered more than 1 at a time anyway.
Great job overall :)