Hi there! Due to scope-creep and bigger ambitions for this game, a lot of tutorial stuff just didn't make it in. We do plan to expand on it more after the jam's judging period ends, though. You should be able to right click on blue objects with the grapple ability active to zip to the blue objects, and the red buttons should allow you to switch to a different ability using the keys 1-5. The on-screen GUI suggestions is definitely something we will do in the near future when expanding this project. Thank you so much for your advice, and thanks for playing!