What would be your prefered keyboard mapping for a controller? I would be happy to implement support for it
I'm not sure what arrangement would be ideal, but I think these keys would at least be workable:
Arrow Keys - Move
Left Shift - Morph
Z - Jump
X - Beam
C - Missile
A - Dash
Enter - Pause
Remappable controls would be ideal, but I'm sympathetic regarding the effort required to implement them.