Make game juicy

[sailormansam]

• [x] player squishes when landing
• [x] falling and respawning shakes screen and spits out some particles
• [ ] sound
• [ ] animate placement and picking up of blocks
• [x] level can be rotated
• [ ] camera follows via spring
• [ ] show block inventory
• [x] disable button after first click on main menu

[sailormansam]

Instead of picking up and placing blocks, let's pick up blocks as coins and when they're placed they can't be moved?