Demo V2.1

Again a decently sized update with the biggest bugs fixed.

Patch notes:

- Fixed vertical camera rotation lock

- Added 2 new objects (experimental)

- Fixed the pausing

- Fixed a bug with the pusher (and made like 3 more)

- Made it so you can't look through a wall

- Fixed a major bug where you could lose a block through the wall or floor

- Improved the jump

- Added a crosshair

- Fixed some small bugs that don't impact the gameplay