This was interesting- I was surprised at how hard it was- I died most times before I got more than ten seconds into the game- but as a demo it's not bad!
One thing that perturbed me a little bit was the length of time I had to wait from going from windowed to fullscreen mode. However- my only experience I can compare it to is with a desktop application and Java so that's probably not fair.
I must admit we probably made a too hardcore (unbalanced) demo but we may fix this in an update.
Yeah Unity performance are not always great, specially the web plugin. But the fact that you can deploy everywhere, including console and mobile, with the same "code", is really great. Now that you say it, it reminds what Java tried to do for applications.
One thing that perturbed me a little bit was the length of time I had to wait from going from windowed to fullscreen mode. However- my only experience I can compare it to is with a desktop application and Java so that's probably not fair.