Don't use system keys as controls.
The game's not bad. I had several times where the controls either stuck or got ADHD and I fired extra ammo or rotated a half turn instead of just a bit, but that may be my computer.
The problem that you can address is the choice of keys. Don't use system keys for controls. Shift and Ctrl are system keys. If you use arrow keys for movement, then A, S, D, Z, X, and SPACE are all readily available for use, but won't cause the problems that Shift or Ctrl will.