*edited* Further observations regarding the game engine freezing bug:
The freezes seem to be related to placing some of the solar sails. Given how the game tracks the solar sail orbits (incl. speed, trajectory, etc.), perhaps some code is not handling +/- INF or NaN correctly, resulting in an error that propagates back to a timer failing to trigger (or re-trigger)? Another possibility is invalid input--It looks like you are using some circle formulas (involving area of a circle and various trigonometry functions); Are you validating things (like tan(90 degrees) == undefined)?