Day 11:
It's 37°C (98.6°F) here right now and both me and my laptop are melting. Nevertheless that didn't stop me from coding.
I've made simple prompt displayed when player can activate switch.
I implemented player abilities and double jump. It works surprisingly well.
And I published and submitted game to the jam. It's right here - https://itch.io/jam/my-first-game-jam-summer-2017/rate/161253
In next two days I'm going to try to draw my own assets, so I'm going to search for Bob Ross on youtube. Wish me luck.