Updates:

Slideshot V 1.1:

Now available! Solves all known issues of version 1.0.

Slideshot V 1.0 - Known Issue:

If a level is loaded directly using the level-menu (not by the program after solving a level), it will not be saved correctly if the program is terminated before the level is solved. Fixed in Version 1.1. Meanwhile you can save a manually loaded level by toggling the sound output in the game's main menu.