Safety gridworld needs

[jjfiv]

with @kclary

• [ ] "stone" status: once you touch this tile, you can no longer move.
• [ ] gridworld time-limits configurable (episode end when time runs out)
• [ ] single-push button: change another tile's behavior
• [ ] interruption tile: with p=.5 set stone status

[jjfiv]

• [ ] interruption tile immediately end episode instead with probability
• [ ] button could lower probability of "stone" status

[jjfiv]

• [ ] "sokoban" push boxes
• [ ] supervisor "tiles" - generalized is "negative rewards only occur during periodic time intervals with graphical representation"
• [ ] directional reward: only give reward when entering tile from certain direction
• [ ] whisky/confusion tile: adds random walk behavior (every future step is random with p=.9)
• [ ] colored background tiles
• [ ] monty-hall boxes (not from paper), related but not as complex

[etosch]

@kclary @jjfiv one of you found a good gridworlds library. Do you think it's worth it to try to integrate?