I'm with the Batonic team and tried the browser beta in Chrome on Windows. City Bounce was an easy starting point, and after Play the transport counter and output meter advanced.
I hesitated at editing the drum pattern. I stopped playback, opened Patterns and clicked "Open City Drums in Channel Rack", but I still saw the arrangement with Drum and Piano tracks rather than a Channel Rack. Is there another step to reveal that panel? An "Edit pattern" label or a short hint beside the starter could make this transition easier.
This is a limited first-session observation. I haven't checked recording, MIDI, export or audio quality.