Many small adjustments

Since we launched the Adventure playtest, we did several silent patches thanks to the bug and feedback from all the different players.
Non of them are big changes, or very visible, but all are helping to make a better experience for the beginning of the game.
Some of the changes those past few days

- Easier levels (slower monster moves)
- Less extra lives (while still plenty offered
- Teleport now indicate potential danger on the other side
- Reward Disk from Alpha to Beta quality.
- Few sound and graphic improvements on few bonuses.
- Few bugs corrected (for instance keyboard remapping not always showing the new keys).
- first Paintbomb level had a invisible wall tile in its middle.

And more...