Created in Unity 5, using a Domestika course on 2D Videogame Development, I also referenced lessons from a YouTube course from the School of Videogames channel.

The game has different mechanics such as:
Run by pressing Shift
Dash by pressing Left Control after charging by jumping 2 times
Jump when pressing Space
Double Jump when pressing space again in the air
Reset to key R
And Hardcore Mode Lowering life to the backspace

The game, in addition to the life and coins mechanics, has a timer to know how long you have been playing. On the other hand, there is a mechanic of pushing boxes to reach higher places. There are also jump pads which help you get to higher places. Also, the game features mobile platforms and platforms that fall over time. Finally, it has 3 types of enemies, the normal one, another that comes out of the ground when you approach and a giant skeleton that is there to intimidate but does nothing.

There are also traps like spikes or bear traps.

https://paganimc.itch.io/hitjump-valley

Hit Jump – Valley Demo

Source: itch.io