Show <canvas> previews for each level (WIP)
Move resize into resource load callback
Update TODO
Store scenes in object; avoid some duplication
Basic previews working
Pass options appropriately to new scenes
Give root element font size

So as to use rem font sizing units
Start converting to rem font sizing
Handle user selecting a level
Update TODO
Show "?" when level not complete
Add a "beginner" diff button
Remove "locking" movement
More updating to rem
Update TODO
rename todo file
HTML formatting
Simply difficulty select view
Buttons move when pressed
Basic level preview transition