Concursion

The difficulty curve in this game is handled extremely well, this is not an easy game, and you will die a lot but the difficulty progression is very smooth.

Concursion is a challenging game with a simple yet charismatic art style applied to fun and clever mechanics.

The story here is also well done, it is a platformer so don't expect anything crazy but there is more of a story than your average mario clone and even a funny little twist that I will not spoil for you here.

I then played the game and enjoyed the fact that it did have a difficulty curve, but I never felt like it was too difficult.

This would be the first collaboration with Christopher Hoag of House fame, who tirelessly composed various mixes of all the songs in the game for each world, and the soundtrack here is striking in terms of compositional depth and variety.