Hi.
I wasn’t able to play properly on browser.
Do you have performance issues? Which browser do you use?
I tested this game on Chrome on my laptop (Linux) and it was smooth 60fps. Firefox gives ~30fps, but it’s still playable. The native builds are the best, of course, since they’re not limited to the browser wasm engine performance.
How long is a game, approx. ?
Depends on the playstyle and luck. Perhaps from 40 to 90 minutes to finish the battle. There is no story mode, only a randomly-generated map battles (although you can adjust the map generation a bit by changing some options).