I test drove Heliboard the past week and I quite liked it, especially the customization options. I've been trying to escape Gboard for years but viable options with swipe typing support are few and far between.
Unfortunately, the lack of Japanese input makes it a total non-starter for my use case so I had to go crawling back.
Perhaps you may or may not enjoy ~~Space Asshole~~ Red Faction: Guerilla. It's a 2009 game that got a solid enough PC port that may run on weaker systems. There's a remastered version but if you're aiming for low-spec the original might be a better bet.
Anyway, it's an open world set on Mars and you go around wreaking havoc and blowing up buildings with ahead-of-its-time physics/destruction mechanics. The combat is more like a shooter and you play with lots of explosives. It's not a huge map by standards today but is a big enough playground to keep one occupied.