If it's anything like last year, only participants do the actual voting. But they did have "Staff Picks" last year as well, so there's that possibility.
You're right to an extent that browser playable games often get the most votes, simply for ease of use. I made my entry browser playable this year for that reason, though last year I did eventually get a decent number of votes (19). From what I can tell, it all just takes a lot of time for people to go through all of these games. I try to rate as many as possible, regardless of my personal biases or opinions on how the game may look, but even still there's no way I can rate every single entry. What I've learned is that being active in rating other games and leaving comments is very important, as is posting about your game wherever you can (like this forum, or the Discord channel).
In any case, I'll be checking out your game tonight. I used to play Lemmings as a kid, so this looks very interesting!