I like it! It's a fun resource management game with summoning and resource gathering! I really like the cloudy background, with the parallax mountains, it really gives great depth to the scene!
The scattered bones are a nice touch as well, making sure the lane doesn't look to repetitive to the player.
I would've liked to have seen the mining resources to respawn, since I quickly mined it and was left with many creatures that couldn't be reassigned to battle shifting, ending up just standing there and waiting.
The music was a nice touch, if not slightly loud, with no option to change that? It would've been nice to have the fighting sounds, like you described in your document, but with the time constraints, I think you did great! Well done!
Also, chuck in some credits for yourself! Be proud of what you made!