About This File
Manic Miner 'Construction Set' for the Commodore C64, by Tim of LCS.
This provides a level editor, It does offer options to save or load sets of screens to disk as well as play the game upon finishing editing.
If you were looking for Manic Miner in general for the C64, please see here for an original or here for a cheat version.
The supplied disk image (.D64) appears to contain the standard level set and is playable as you would expect. There are no cheats built into the game core code.
Unfortunately there are no instructions apart from what are provided 'in game' as such although it appears to be completely keyboard controlled for the editor part. The 'main' keys are:
F1 Next screen
F3 Previous screen
F5 Return to menu
F7 Edit mode