You have no luck getting health cannisters, because you get the 3 at the beginning and that's it. So use them wisely ;)
I have heard it a lot that the controls doesn't feel right. I'm not sure if this is due to the light system I used which is a problem for not so good PCs, because on my gaming PC it is running super smooth. It could also be the Web version. You should get better performance downloading it.