Update 0.2

This minor update improves visuals and adds 5 new levels and changes their order for a better learning experience.

Known issues:

• The star amount is incorrectly displayed for certain previously completed levels.
• When two generators power a single cable, only one is considered when calculating energy. As a result, the cable is not powered when that generator runs out of energy but the second one still has some energy remaining.
• In rare cases, red cable remains unpowered even if the generator has enough energy.
• Undoing a move may occasionally incorectly revert remaining energy, which sometimes results in negative energy amount.

Note: Restarting a level temporarily fixes last two bugs.