>-I recently played the game with two friends who haven't played it before. They meant it's quite fiddly sometimes to move the clonk throught the landscape. For example you get stuck on some small edges on the ground and you have to walk back and jump over it.
>I made a video to show what I mean: https://youtu.be/EmlBRy89EYs
>I guess the gap is too small for auto-scaling.

This should be a bug report.

> -Moving from left to right (and vice versa) feels sluggish. Yeah it makes sense but it doesn't feel that great to move the clonk.

This is intended, we never tried to have a mario-like moving.

> -When I use the grappling hook and hang on a wall or ceiling and then fall off, the clonk doesn't grap the rope, unless you press up. That's annoying when you accidentally fall off. The clonk falls all the way down until the rope ends and you have to climb up again.

Also intended so that you can let go off walls and determine yourself when to catch the rope.

> -While diving down, the vertices of the clonk are too high (or the graphic is too low ).
>Sometimes it's hard to tell where you can dive.

Agreed, somehow not that easy to fix and quite a bit of fiddly work. I don't have the time or interest at moment to look at this another time.