How two modes works. Exploring map vs building tracks.

Binary is 5162 bytes.

Low level UX:
- mode 0: viewport panning
- mode 1: cursor movement + tracks building

For future there will be mode 2 for infrastructure placement/management.

Current size: 5175 bytes.

I'm starting implementing game-play elements. Slowly. This is now hand placed elements but the engine recognize carts (empty or resource type) and can draw one type of railroads.

Binary is almost 5K at the moment.

Implemented DawnBringer's 16 Color Palette!

Current binary size: 4187 bytes

Small but useful thing: added debug state. For now it shows all the decompressed sprites.

Also added more sprites into the game.