Bleeper

In Tally the machine discovered. Here it challenges. Bleeper is the C64’s take on Simon: four colour panels, each with its own note, light up in a sequence that grows by one every round — and you have to play it back from memory. The trick at its heart is escalation: the chain lengthens each time, and the game is just how far you can hold it in your head.

This is the volume’s audio-forward game — the one where the SID chip earns its keep. You’ll POKE its registers to give each panel a distinct pitch, store the sequence in an array that grows a slot per round, and read the player’s reply a key at a time with GET, checking each press against the stored pattern. Sound, memory, and live input, working as one.

What you’ll build:

• A single panel that lights and sounds at once — colour and a SID note together
• Four panels, each its own colour and pitch, lit by one reusable GOSUB routine
• A sequence stored in an array and played back by a loop
• A round that grows the sequence by one random panel each time
• The player’s echo, read with GET and checked press by press against the array
• A score — the length you held — and a “play again” that starts a fresh sequence

6 units. About 6–8 hours. This follows Tally and builds on Meet C64 BASIC.