UPDATE: assembly instructions
I finally had some free time to make something fun and decided to write a new game for the Attiny85 ssd1306 keychain. I reused the sleep, display and interrupts code from the “Breakout” game I created a while ago.
This time I wanted a more addictive game. The game had to be playable using just the two buttons. I thought a racing game might be a good choice but the landscape screen is more suitable for a side-scroller. So I settled for an obstacle avoiding side scroller. Similar games include the recent Flappy Bird, Nyan Cat and many variations of the Helicopter game.
The flying saucer is propelled with the left button while the right button is used to shoot through force fields. The game gets harder as you play: