That Sierra coffee mug is awesome! I've been collecting Sierra stuff for years and seeing things like that are just like wow! Did you happen to work for Sierra before chainsaw monday or afterwards?
I'm surprized it wasn't level 12 or 13 can't remember for sure but its that icy level where you have to go almost all the way through it, get the lazer, then you have to backtrack all the way to the beginning to get some grenades behind the rocks then go through the whole level again. Or maybe it...
I'm surprized you let the first boss part damage you so much. You can jump high enough for his swirling fireballs to miss you. Pretty sure you knew that though. Awesome job with the level looks exactly like the way I play it.
Great job! When the video faded to the actual game it took me back to the late 80's again.