A nice little game, unoriginal but still fun to play. A few comments after beating the 3rd boss:
- The second run felt really bad. The first run gives you some time alone before the enemies spawn, but from the second run onwards enemies spawn immediately. Without any upgrade, it is challenging to get trough an ore block and gather upgrade materials while under constant fire.
- The enemies spawn faster than you can clear them, which is an issue. I would expect killing enemies to reduce the pressure on you. Instead, another pops up almost immediately, attacking from a new angle while you try to grab the salvage from the first. It makes killing enemies pointless if you're trying to mine, you're better off ignoring them and only bothering with enemies when you're trying to summon the boss or gather salvage.
- Mining is odd. At the start it's challenging. At the end of level 2 you can drill trough the dirt fast enough to dodge bullets and go far enough you have ample time to do so.
- The ball enemies in level 2 are somehow easier to kill, less dangerous and more rewarding than the basic cannons.
- The bosses were generally just a block of HP to drill trough. Their attack pattern barely mattered compared to the constantly respawning cannons forcing you to dodge.