While I like the concept of the game, I wish the controls were either wasd or mouse, as I keep trying to move with wasd even while using my mouse. Pretty good for a first game, but could use some work.  Good job getting it out though!

Fun game, surprised with the controls at first :D
Better to play on small screen to faster maneuver around.
Difficulty could be harder :)
Overall good job!

That's an interesting idea for the theme! I noticed a few quirks that come from unity and I went trough at the start as well but nothing too bad. I think the concept could hugely benefit from using a grid to build stuff.

But considering this is your first game it's pretty neat. Definetly don't stop learning stuff, it's super rewarding!