Sokoban-style puzzler about smelting alloys, later adding lasers, mirrors and prisms: 150 solver-checked levels with undo and par scores. For 48K and 128K.
Tower defence inside a ZX Spectrum: place six kinds of anti-virus towers and a bomb to stop bugs, bots and gremlins reaching the Z80, across 40 levels and four difficulty modes. Needs a 128K Spectrum.