What are some alternatives?
When comparing Mega Man Revolution and SuperTux, you can also consider the following products
Hollow Knight - Descend into the Dark Venture down into a beautiful, ruined world of insects and heroes
Mega Man Rock Force - Megaman Rock Force is a fan-made game designed to mimic the look and feel of classic 8-bit Megaman...
Super Meat Boy - Let's start with what's the same: Dr. Fetus is still a jerk, gameplay is super challenging but fair, there are tight controls and great levels and you will die. a lot.
Dead Cells - Castlevania-inspired, action platformer with roguelike elements.
Secret Maryo Chronicles - Secret Maryo Chronicles is an Open Source two-dimensional platform game and is using an Open Graphics Library for the best possible graphic design and stock performance.
Minilens - Libre puzzle platformer for gravity-oblivious aliens