I’m sliding down with new features! 
That is, indeed, sliding:
After dealing with tilemaps issues I could finally prepare a small video, where I tried to show you how wall sliding works in Platypus 
I’m now clearing things up and soon will add a Pull Request with this feature on board. I hope it will be useful for you too! 
I was making visual effects for fire and decided to advance its simulation by adding a 
fire propagation algorithm I was describing in that thread. So now, I need to reconsider world construct and decide on what type of destruction I want and will be able to allow.
There is a progress with GUI and inventory also and now I’m adding items to the game
Now I’m in the phase of refactoring, I need to tidy up my project, select and prepare features that are to show and create a new demo, which I wish to be good enough to present to a broader community.
I had an irresistible desire to apply directing projectiles - I tested that solution, but weren’t convinced with controls, though what if I would allow to target during slow-motion or even pause? 
Also, in that case I would probably need to make animations for at least 8 directions (4 when ignoring flipped sprites) or create some not-so-beautiful rotation, like in games where hero carries a gun that you can rotate around him or her.