1.01 features.

- now tutorial is more helpful
- ingame option is available
- game spawns garbage tile in game
- new enemy
- waves are extened up to 15 from 10 (last version)
- railroad now has an hp regain effect
- railroad gives extra speed bonus for 1.5 seconds
- you can sell or upgrade items in store
- new more decorations on the map
- ducks now have random box effects