У вашего броузера проблема в совместимости с HTML5
Hey, it's that Serious Sam game everyone pretends doesn't exist!
Note that in the second clip, the ceiling spike trap that pushes me through the floor is actually like that, I wasn't using any cheats or anything to become invulnerable. The spikes will usually instantly kill you, but if you do something specific that I didn't figure out (maybe stand at the perfect spot), the spikes don't harm you and, instead, shove you off the map.
Anyway, I'm gonna start cleaning up my Fraps folder because it's got 400 gigs of footage there right now that I'm too lazy to edit because they are barely worth uploading, but fortunately that never stopped me before.