Quality of Life:

- There is now a little animation to show which items are synergising - it'll play when you place an item, and at the start and end of a boost!
- I've reworked some of the code in the background which should mean a bit less stuttering when the engine is going really fast! Hopefully I've not broken anything else alongside it.
Bugs:
-fixed continuing a run being broken after the tutorial update
- made the decimals on the 'visual speed' screen work properly