Completed Ice Mechanic and Improved Undo Function

Today I fully completed the new ice mechanic by completing the code for Pull and have completed code cleanup for now. I also improved my undo mechanic, the player now faces the way they came rather than the same direction which looked quite jarring.

Here is a brief outline of the main remaining tasks before completion:

• Removing the "switch" mechanic, allowing Push and Pull to be controlled at the same time
• 1 -2 more new mechanics (depending on the number of quality puzzles I get with the existing mechanics and the pacing)
• Puzzle design for the new mechanics
• Art & music overhaul
• Polish & final bug fixing