The genre is so called Metroidvania and SHMUP. There are a lot of places to walk, jump and fight around. A lot. Just like Metroid. You will find special weapons and upgrades. Very much like in TGL. The flying stages have a lot from TGL. Author made many enemies and bosses almost directly from TGL. And the protagonist is also a transformer.
But I warn you! The walking and jumping here is a lot more than flying. So if you love Metroid this is good for you.
I should mention that the game is still in Beta. It’s a full game already but there should be some minor updates. So keep that in mind. The game also should have some different endings. Yes the game has plot. I am not sure how much endings it has now(there was at least one). Let me know.
The game can be found here: