Unfortunately, there is no demo for this game. The price is to support the apps development, the assets can get expensive. The App lab version is coming soon. I am hoping to add more game modes and online pvp support. Make sure you have enough room to play.
Do you plan for a demo? I really dont want to buy something unless i'm sure it works fine at my place, and to see if the game is "for me". Never tried a refund here. rather have a demo/trial or something :-/
Dude. With a creator like this, I will support you and buy it So no need for a free key. This is how you know a developer care for his product :) You made a sale :)