Here I just wanted to show some pictures of how I think the air is supposed to get in from the front panel.
So here is the front of the case. as you can see there is about 1/2" gap between the front panel and the floor.
with the small door opened, you can see there is nothing really in between the front panel and the hollow part of the case
Inside, you can see there is a sort of vent leading to the outside of the case
Where the fans are mounted. Also, the floppy drive bays above
Front panel, I popped out the 3.5" bay cover to allow some more air to get in.
Apparently, whoever designed the case thought that those small spaces where enough to let air flow in. It obviously isn't sufficient for good air flow, but I think it's alright for now.