The game has potential, although there are some bugs to be worked on and some improvements made.
List of Bugs I found:
1. You can buy Unlimited Items from the shop with no penalty whatsoever. 2. There is no limit to how tall the barriers can be. 3. The enemies just become completely static when you're on top of a barrier tower. 4. You can just stand on top of the enemies without getting hit at all.
List of things I think should be improved: 1. The GUI for the inventory is way too small. 2. The rate of change in the difficulty is too quick and can get very hard after just a few minutes. 3. The money you earn from chopping down a tree is too low and after chopping down 3-7 trees you get overwhelmed with enemies and you're left with money just to buy 1 or 2 barriers