Just uploaded a new browser version 0.0.6beta - I'll get the cross-platform downloadable versions up once I'm finished updating the levels :)
Several new features fully explained on the devlog (available on mobile as well):
Options for shading, cpu throttle(for older devices), lights, graphics (32x32 or 64x64), and sound control
Behind the scenes, I implemented a new "modular" approach to making the levels that gave me a nice boost in performance.
If you're interested, you can check my youtube channel for some videos I made during development: