I love these pixel-art sidescrollers, so I’ll definitely give this a go. One of the first deck games I bought was Expendabros, and I enjoyed it for what it was, and the nostalgia. It actually made me want to play Flashback again, and it just so happens that Flashback is less than a quid this few days, so that’s going to be me for the next few days!
Author’s website, which, after playing a little text game, takes you to a better place to buy it from than Bezos’s fetid swamp - https://curiousvideogamemachines.com/