This is an insane game for 48 hours!
The idea is great, the look is great, the feel is great!
I really like that different elemts have different effects and it seems like some enemies have protection against some elements.
I think the few problems with this are the camera, gameplay and sfx. The gameplay is running away most of the time. I think if you made it so more resourses are available and/or they drop from the enemies it would be better. You need something that makes player on their toes. I think a Doom approach will fit this idea perfectly.
Camera just needs more polish. Sometimes goes through walls, sometimes very close or inside something. Maybe change the level design to fit the camera better (get rid of the maze).
As for the sound - I wish it was there. I understand the 48 hour limit. Its just sometimes unfiar when you dont hear the fireballs.
Overall a great game and a great entry!
Keep it up :)