Pretty good idea for a puzzle game.  It was hard to see the icons and the numbers, those should have been bigger and more clearly separated from the background.

I think the timer made the game frustrating more than it added to the game.  Resource management games are all about planning and thinking, so either making it turn based or adding a pause button would have made more sense.

Not sure if it's a bug, but I couldn't get pieces to rotate either.

The idea is great! In the beginning i  was confused, and now i'm still confused yed in little things, the sprites are very little so i don`t see them well. It will be great if you fix the size and show an tutorial in the start

First time I played the game I thought the timer on the left meant that I need to place as many objects as I can before the timer runs out...  turns out it is a timer to indicate when resources will be added and subtracted.  I eventually figured out how to play it

I did not get it.

Can you build the game with GLES2? My notebook can't execute GLES3.
EDIT: I got the source and did myself.