Great fun! Very reminiscent of Motherload with the digging mechanics, and while I wasn't keen on the magnet at the start it became way more fun when I was hauling hundreds of resources up at a time.
The game was split into 3 stages for me: The start where I was lost at figuring out what to do, the middle where the groove got going and the game was an addictive digging simulator, and the end where I steamrolled through the map with my enormous wealth. The final boss did jumpscare me though, moments before it was vaporised by a wall of turrets.
I also managed to break enemy spawning on my second run, when I deliberately lagged the game out with thousands of resources ;)
Controls were good. The art style was also cool, especially with the glitch effects around the border. I do wish the music would replay occasionally, since it added a lot to the ambiance. Overall I had a great time with the game, nice work!