Not sure how well it holds up since nobody mentions it, but Tiny Tank was fun when I was a kid!
You're a sarcastic tank and fight other huge robots after they took over the world basically. You have 4 spots on your tank to put a lot of different weapons and could upgrade them during the level with positronic brains from enemies to make them more advanced (e.g. homing missiles, faster firing, etc.)
I haven't heard about Sand Land at all, but after checking it out, that looks cool!