
The game is a mixture of “Yoshi’s Story” with its visual elements and “Castlevania” with its character traits and sub-weapon system, and features four playable Vocaloid characters: Hatsune Miku, Megurine Luka (in “Tako Luka / Octopus Luka” form), and Kagamine Rin and Len. The game has adjustable difficulty and supports two-player simultaneous action. – [Reviewer’s Video]
[Download for Windows]
(If the game fails to load, change the name of the .exe file to english characters).

No idea how this game is 500mb. Pretty decent platformer, though.
I think it’s the music and sounds; pretty sure nothing is compressed and it’s all baked into the exe for some reason.
I should grab a friend for the 2-player; I suspect I’d enjoy that quite a bit.