Floor render coordinates for actors

This ensures that their sprites appear crisp.
atwall flag
Functions to query actor state
Switch direction when an obstacle is hit
Allow enemies to kill the player on touch
Support respawn areas
Respawn player at last respawn point on death
Use actor and animation scripts for player actor
Support background layer
Support background images
Render level background image if available
Respawn the player at the true center of the respawn area
Kill the player if he falls out of bounds
Add hud icons
Coin field
Start with 5 lives
Support fringe layer
Stalker actor
Allow stalker to jump one tile high
Expose actor:applyForce