I was happy to give this a play, found a fair amount of bugs but for a demo I was pleased so far, look forward to the finished product. Don't forget Gamejolt too ;)
thanks for have playing , if you use keyboard for missiles and Zeta Bomb you must press numpad 0 and numpad 1 on keypad.
If you use the joypad , press right back button for missiles and confirm button for bomb
I did try that but nothing happened. My controls for movement also sometimes froze and on occasion they would invert which was odd. Towards the end during my summery I could continue to get a score, I think things were hitting me in the background. A few others too but I wait for the next version.