Visualise jump arc in debug mode

[Thesryn]

This may be one of the more complex things to, so ignore it if it blows your mind
but
I would like a debugmode, which adds a physical representation of trajectory of the cricket
This way, the level can be made easily without me having to git gud at the game and understand how long to hold in the jump buttons.
I can also much easilyier figure out where to put platforms and such...probably

[sionleroux]

I'll think of how this could be done, it'll probably involve some maths...