Nice little game, the slingshot felt really good and the level design was nice - I liked moving between areas through the hollowed out trees. Crashed both times for me just after the water section as I moved up the slope into the next area.
If people are having a hard time playing your game and it lags then you need to add scalability settings in the ui; several of my previous games suffered from this and I only learnt how to fix the issue today (so too late for the official jam entry!). It doesn't matter what you have the scalability settings at when in the editor, Unreal will override them and set them to Epic when building for windows so only the most high spec computers can handle it.
Follow about the first 8-9 mins of this tutorial and you should be good -
