This game is a typing contest where you need to type the shown number (hold down the key). The game is Computer Nightmare from Usborne Creepy Computer Games (1983) by Jenny Tyler & Chris Oxlade (ed). Free pdf:s are on https://usborne.com/row/books/computer-and-coding-books. The ZX81 BASIC original was typed in by XavSnap on https://www.sinclairzxworld.com/viewtopic.php?f=4&t=1809. Converted to MicroPython for NumWorks calculator and simulator by mobluse/MOB-i-L. The converted program is close to ZX81 BASIC and not optimized or pythonic Python.