Understood. Yes, the cursor keys at the top of the keyboard are pretty useless, but old-school Commodore 64/128 users generally still have the muscle memory to deftly use the lower right cursor keys, and a lot of applications were developed with them in mind.
Looking good. I've made it through the demo levels a couple times now. Note that WASD (rather than WAXD) is a far more natural (and modern) keyboard directional configuration that users will find more agreeable. You might also consider allowing cursor keys as movement, as most Commodore users...