Fixes

- room with four rewards : can only pick one
- "Golden Compass" now updates the room type directly


improvements

- Add a "normal" difficulty mode (making it clearer that "easy" is for beginners)
- Improve "Explosive Barrel" sprite : change the color to make them easier to spot
- Improve animation : Add a visiual indicator when a "Parrot" is about the dash
- Slow down "boomrang" so they are easier to shoot at
- Update "fire trap cannon" to be easier to be differenciate with regular "trap cannon"
- Reduce a bit Fog density
- Chests are less likely to be spawn after a "Fight" room (for all difficulties)
- "Penta" (summoning circle) lasts a bit less
- Add sound effect for "Refill barrel" (more coming in the next patch)
- Item balance : decrease overall damage given by items + minor tweaks