If you have played Stigma, you should be pretty quick to learn how to play Stigma2.
Start it up from the shell, and the following screen appears:

Pressing '2nd' will launch into the game, and 'Alpha' will scroll through all the available levels on your calculator. (Clear will exit the game, but you don't really want to do that (do you?)).

Press '2nd' at the 'Level:' screen, and you will be dropped into the game. Your keys now are: Left/Right/Up/Down - move the ball, +/- - change the level and, once again, Clear to exit. Pick up all the orbs on the surface, then return to the base to complete a level. Here are some of the tiles you might meet:

Plain Block - nothing special. Slippery tile
Plain Block - nothing special. Walls - you'll bounce off these.
Orb - pick these up! Arrow tiles - pushes the ball around

Tiles can be arranged in special positions, so as to create different 'effects' - such as black holes and whirlpools. You'll find these out when playing the game... watch out!

This game has been designed with external levels in mind: hence the level editor!

This is quite simple to use. Click the tools on the top-left of the form to set the drawing tool. Left-click on the grid to the right to add the tile. Right click will toggle orbs on/off on that tile. Use the slider under the 'toolkit' to select which level to view - click the [+] button to add a level and the [-] button to remove one. Click on the 'Menu' button to open/save level packs. Remember to put your level name in the box marked 'Level Name' - please upload any good sets to www.ticalc.org!