Update for Post Jam "Jam" #9

Submitted for Post Jam "Jam" #9 with following changes:

- made blocks bigger to make it easier to land on them
- reworked all the levels
- added collectibles and collectible summary on endgame screen
- added new type of block
- added moving platforms and non lethal spikes
- wall jump is not higher than normal jump anymore)
- added parallax backgrounds
- updated soundtrack