Quack!

Quack! is a clone of the mobile game Flappy Bird for the ZX81 computer. The gameplay is the same as in the original. The player controls a bird which has to be navigated through the gaps of an endless amount of pipes. The bird automatically moves forward and all the player has to do is tapping a key (any will do) to increase the altitude of the bird. Not tapping causes the bird to fall. The player scores for each pair of pipes the bird passes and the game ends when it crashes into a pipe or into the ground.