Cylu  
This game overwhelmed me. It was hard to see where I could go, and impossible to remember where I'd been. Then I ran out of fuel. Wishing my robot could have moved faster, I gave up. However, save for a 'popping occlusion' problem in the foreground, the presentation is absolutely stunning.

Operation Spacehog  
Incredible! However, it could seriously do with an autofire feature; and some of the info in README.TXT could be coded into the game, as hints as you go along.

Video Games I  
A novel idea, but way too confusing for me. Good implementation, and I like the morph effect or whatever it is in the main menu. Works well in DOSEMU by the way.

YinYang  
An intriguing, mesmerising effect, very well done. And now with the bug fixed, so here are your full marks as promised!