Itch.Io Link:

https://thedaileygrind.itch.io/estius

Estius is a 2D platformer boss-rush hybrid where the player traverses a series of levels, fighting a boss at the end of each until they reach the summit of the deadly Mount Estius. Estius is a WIP and will change drastically over time, if you are interested, a list of upcoming changes for the game is in the description on the itch.io page.