The mission objective for Blok Copy is simple; the playfield contains seven distinct designs of tile arranged into columns of five and, at the start of each level, those tiles are shuffled around; the operator must then reorganise those tiles to resemble their starting order to unlock the stage and progress to the next until all ten levels have been re-synchronised.

The joystick directions move the four cursors placed at the edges of the play area and holding the fire button down and moving simultaneously will shuffle the highlighted row or column.

source: cosine.org.uk

If you are interested in BASIC programming for the C-64, then you have probably used a BASIC Extension at some point.  Most of us are familiar with Commodore’s  Simons’ BASIC cartridge.   Unfortunately, most of these extensions aren’t very useful.  Simons’ BASIC, for example, has a pretty lousy set of commands.

Many of them are basically (pun) useless.  It’s also a very confusing set of commands — there are no consistent conventions used, making it necessary to constantly refer to the manual.

Further, a program written with Simons’ BASIC can only be run on a C-64 with a Simons’ BASIC cartridge.  Pretty limiting.

DotBASIC Plus is similar to other extensions in one way: you get a lot of new commands (or DotCommands, of course) — over 100 so far.  But that’s where the similarities end.

source: 8bitcentral.com