~ <3

Yo this shit is wicked, good job man I'm impressed 

Really nice small game you've made for the Blackthornprod game jam. Sadly it seems like you didn't submit your game to the game jam in the end. As I couldn't find it on the Jam Page and it should be shown on the sidebar as "Submission to Blackthornprod Game Jam".

Now let's talk about the gameplay. If you want to further work on this game I would definitely recommend to either add that the player dies when he leaves the camera view. So that you don't fall off and land on a platform further below and get stuck because you don't see yourself (A restart button would work to put is definitely less polished).

Then 2nd thing would be, if you want to create more levels you should definitely start using prefabs because as it seems in your video you simply placed every single block by hand and added collision for them. Instead of that time consuming task you could create a prefab with a collision for each block you've made and then simply scale that instead of putting the sprite into the game scaling that and adding collision boxes each time.

Also you would definitely fix the current jumping as you can do that indefinitely I'm strongly guessing that something is wrong with your jump code and perhaps you are not detecting when the player is on ground again and can therefore jump.

Besides that tough really nice game, even tough you are still a beginner in Unity the overall aesthetic and atmosphere of the game are amazing and make the game a very enjoyable experience overall. Very well done especially for your first game jam entry. I've made much worse when I first started making games.