1) Controls are slippery. I shouldn't keep sliding forward when I let go of the forward button; I should stop moving. 2) Graphics for the cave (and even the sky level to an extent) are way too dark. I like challenge, but it's not fun when I can't see the projectile that hit me. 3) The piercing shots will sometimes glitch and go straight through an enemy without dealing any damage, which is extra frustrating since they have limited ammo and the only way to get more is to reach a crafting station and spen...