Also, forgot to mention this before, when the enemies stack up at the case, the ones that were already there should be the ones that are attacked first, as they are the ones who will hit the case first. When the peashooter overheats once, it never will again, at least it didn't for me, and in the tutorial you say that the peashooter doesn't have a rate of fire. This is blatantly incorrect seeing as the rate at which the gun fires the bullets is the gun's rate of fire. Also in the tutorial, some of the information seems to be cut off, again this could just be a bug that I am encountering, but some of the tips do not show all of the words. The graphics are done well and don't scar your corneas to look at, which is always nice. Again though, great potential, just needs polishing.
There's potential for this to be a good game. The "upgrades" are way to expensive at the beginning, I keep running into a bug where if I retry a level, no enemies come, and the skill tree is almost entirely useless. The +25% damage buff didn't appear to do anything. When I went back to the main menu the case was still there in front of the text. Again though, there is great potential here, it just needs to be finished.
 "Red Ball 4 (vol.1)"){kind=icon}
 "Desert Bike"){kind=icon}
 "Wake Up the Box 4"){kind=icon}
 "Diamond in the rough"){kind=icon}
 "Happy Builder"){kind=icon}
 "Top Defense"){kind=icon}
 "Brave Kings"){kind=icon}
 "My Little Army"){kind=icon}
 "Hungry Sheeps"){kind=icon}