http://store.steampowered.com/app/430210/Megaton_Rainfall/You play as an invincible flying dude with hilariously destructive blasts, and your goal is to save humanity by blowing up attacking alien invaders that are terrorizing cities around the world.
Unless there are unlocks that I've missed, you get a couple different kinds of moves, but not a -ridiculous- amount of them. Your basic attack is a little hadouken blast that's still powerful enough to blow up buildings. Shortly after that you get a kamehameha that is so powerful if you hit a city with it it's pretty much game over. Shortly after
that you gain the ability to fly SO FAST you can leave the planet and not only visit other star systems, but whole other
galaxies.
Cool stuff included: Terrain deformation. Procedural generation of cities. A pretty mostly kinda accurate representation of -the entire earth-, with a buncha cities that include pertinent landmarks, like the Taj Mahal, Big Ben and Parliament in London, and all that crazy crap in Dubai. Seamless open world nonsense at a hilarious scale - fly around a city, land on the ground, then fly up into the sky, into space, through the rings of Saturn and out into other star systems. Buildings are inexplicably detailed enough to have like, floors and people and furniture in them, for when they are inevitably blown up. Non-Earth planets, despite
mostly being just scaled up Mass Effect 1 planets, do have
some detail to them. For instance, Saturn has its dust rings, Mercury is so hot the heat-wavey effect is everywhere there, and (in a Nerdcubed video) there are binary star systems, which DO have weird binary star sun nonsense that you can look up at from the surface of other alien planets circling said binary stars.
There's decent enemy variety, though unfortunately the game seems to want to focus on precision than blowing the hell out of crap with your ridiculous god-powers - enemies have weakspots that you generally want to go for instead of just vomiting a thousand death-blasts on them, and the like. A lot of them seem to be designed to either make it challenging to target or explicitly countered by some powerup, which is kinda lame I guses.
Overall, though, yeah. Pretty neato.