GreenDragon  
A very complete game, and I didn't experience a single bug. I wish the gameplay was a bit more flexibe (more options, perhaps obstacles, etc), but it was still decent fun :).

Lander 2  
I found it to be a damn hard game, but it was great fun, too. I like the meters that give you an idea of your 'velocity'.

Sky Ball  
Very hard! But I enjoyed playing this game. There's not a whole lot to it, though. The music is great :).

Trash Man  
It's a game about being a garbage man. I think that in and of itself makes it worthy of a 10.

Zelda Classic  
I love this game. I was really into ZQuest a few years ago... and I think that's what actually got me into programming :). It's a very nice tool... also, the game has lots of quests available for it, which is awesome :).