Orange Moon [official site] is a 2D platformer that's part action, part RPG, and part roguelikelike. As an inquisitive astronaut-cum-explorer, you set out for the titular Orange Moon in search of new life and natural resources. As these things tend to go, you're met with a far harsher environment than first expected (seriously, does any planning go into these expeditions?) with threatening native life, perilous terrain, and shit-loads of traps and contraptions to overcome. Take a look for yourself below:
As you'll spot towards the end there, customisation plays a big part in Orange Moon as you hope to "augment your explorer to make him suitable for upcoming challenges, upgrade weapons and ammunition with ancient alien technologies and materials you'll find in your journey." In practice, this grants you seven weapon types with specific ammunition, all of which, the game's blurb informs me, can be upgraded in 50 different ways. Equipment faces the same treatment and can be enhanced to the tune of 15 variants, and the points accumulated from plundering the foreign landscape and its residents can be used to unlock new weaponry, ammunition and further upgrades.
You can download a two-level demo from Itch or IndieDB. Developers Betelgeuse Zero are also selling it on Itch for $9.99, though right now the paid version's the same as the demo. They plan to add more levels and whatnot to the paid level as development continues, and are having a crack at at Steam Greenlight too.