Ok, haha I managed to clear the jump. Not sure what I was doing wrong before. it helps pressing down spacebar for longer I think.
I like the gameplay idea, I thought the use of the lamp as a gameplay mechanic was great idea to identify 'true' gold. I wish there was a voting category for the theme, because I wanted to reward games like yours more than others.
My constructive feedback is still that you definitely need to work on the sensitivity on the mouse movement, not sure why it's sooooo sensitive. It makes it rather hard to enjoy in my case I'm afraid. You put in a lot of good effort in level design as well which I loved, but couldn't really get far and play more because frankly I was getting a bit dizzy haha ;D
Also, I know others liked it, but it's totally a personal preference, so not a huge fan of the pixelated look so much. It made identifying the real gold from the fake a bit more difficult (couldn't figure out all the time what particles are 'dense' or not), but my biggest concern was that I honestly couldn't read the text on the walls! I had to go up against them, and walk from left to right reading a few words at a time. I think if you made it slightly more detailed (not much) it might have been a bit better, otherwise it's slightly too 'blocky'. But personal preference.
Good little game, though, very nice effort, well done!