This played really smoothly on my HP touch-screen laptop, using keys and on-screen movement. I especially love how avoiding diagonal movement seems to work in the game's favor, creating smooth, intuitive interaction with the 3D world. Great work making MV3D really shine with sprite tags, too!
In the mv3d project I'm working on ( lawest.itch.io/syntence ), I had to reduce the camera freedom for the player to make touchscreen movement easier, but it's great to see you can have an intuitive first-person MV3D experience.