Looks nice enough, right?
In free time of last days I've been developing earlier mentioned thing in Love2d, which is platformer engine.
One provides a simple framework for games that use combination of aligned tiles and dynamic objects.
As well it adds a easily modifiable system to load levels from strings, giving freedom for implementing level editors.
You can download a compiled version here or watch discussion thread on official forum here.
Love2d is interesting engine, I wonder how it compares to OpenFL.