Pro tip creating a new 2d material with the friction of 0 solves the sticking to walls problem :)
Pretty fun game i especily loved kangross :D Maybe speeding up the boomerang come speed can improve the game.Other than these great work :)
Viewing post in The Great Outback jam comments
Also I think you're right the boomerang was tad slow. This was personally my first game jam and I ended up spending a lot more time getting the mechanics working than I did designing the level. I also didn't spend much time fine tuning the game feel but its definitely something I want to come back to.