Cool game, it took me a bit to learn but I kind of didn't read the text haha (Thought I could wing it)
I like how the build system showed you a bright grid that clearly shows you're building. If you add more color to other parts of the game (UI, Monsters, Purchasable/Not-Purchasable etc.) it would be clearer and more appealing.
But overall I had fun :)
P.S. I also didn't have time to make a tutorial so I also had to make a text tutorial haha