Add initial level views, fix column name in level table, migrate db
Add player control of robot with arrow keys
Add grid_width and grid_height cols to level table, set up rable, migrate db
Reorganize; remove boxes model and table, add cookie column to level, change placement of kitten, add cookie placement, add level 4 to db seed, migrate db
Bootstrap level data and draw initial grid of boxes
Add checks for robot box collision, fix bugs
Clear interval on find of kitten, draw kitten image when found
Show win message and timer
Add working submission of high score
Add message on submit high score