I met the people from http://www.specialeffect.org.uk/ when I stopped by their stall at EGX Rezzed, accessibility has always been important to us in terms of game design so I was intrigued by their eye tracking car game made by Codemasters, SOAP. I was also impressed by their charity work with disabled gamers and asked if there was anything we could do to help.
We had a chat recently and it dawned on me that you could play Kaiju Panic entirely with the mouse if you wanted. With a few small changes to include linger and blink controls we could allow a whole new group of gamers play our game. This would likely be an optional control scheme in the full release or a modified version specifically for eye tracking. Most eye tracking hardware can control mouse movement so you wouldn't need any specific device or you could even use a mouse if you felt it made the game easier to control.
If there are any other accessibility concerns or suggestions please feel free to contact me about them!