Downwell (video game)

Downwell is an indie video game published by Devolver Digital in 2015. It is playable on Steam (service) for Microsoft Windows, PlayStation 4, Android (operating system), IOS, the PlayStation Vita, and later added to the Nintendo Switch. 
Gameplay.
In the 2D game, you play as Welltaro, a "curious man", who descends a well with gunboots while taking out enemies and getting new weapons and upgrades after each level.