Note that this is a pretty good upgrade over what was provided in the LXD days as the demo environment now offers a lot more resources, faster storage and more importantly, the ability to play with VMs too!
Until we get a first release of Incus out the door, the demo environment is going to be tracking our daily builds instead using those packages.
Also for me, everything worked perfectly. The only tiny detail is that, on my Brave browser (v1.58.127, Ubuntu 22.04), sometimes the bottom button is almost hidden.