Hey PixHammer, I had fun doing a quick overpaint with your tiles, you'll get an idea of what your game may look like with some improvement with your art.
Assuming you are on Photoshop,here some tips to make things richer :
- First of all, everythings look flat, I've added a 3D feeling only by duplicating each of the square rock with a darker layer behind ( with some clean up )
- I changed the constrast with Ctrl+M : To increase dark colors
- I also used some color shifting with Ctrl+B : basically blue in dark tones, green in mid tones & yellow and red in lightest part of your tiles
- To fit in the maya theme I've added some broken rocks from the existing assets (just some eraser tool) and plants, you shouldn't think only with square tiles, adding more complicated details even not useful for gameplay purpose make the whole background richer
Sorry if I made some spelling mistakes, anyway, you are very welcome to ask me questions!