Update 87 - Magnet Improvement, Fixes

Game Design Learning: These "magnets" gather all xp/choco in the level. But at game start there is none lying around. People didn't understand what the magnet is doing, as nothing happened after "touching" it. Solution: I now force-create 10 xp/choco when the magnet is touched.

https://i.imgur.com/5TjFold.mp4

- Improve loot collect-flight behavior
- Fix: Avoid saving several times within a frame (e.g. when a lot of chocolate is gathered). Now there is a timer waiting for 0.5s before the game can save the next time.