need some advice

so the top i bought for this cage wasnt workn to well for my snake cause she was wedging herself at the top and getn out.......so i made a top out of some heavy wood and was wondering wat everyone thnks should it have more holes in it besides the one i cut for the light????????? http://i1210.photobucket.com/albums/...75/photo-1.jpg

probably, ventilation is good but too much will suck out all the heat and humidity. mine is covered in foil with the only holes in it being for the lights, but i feel like im in there enough to keep fresh air in the cage, and if theres too much humidity i slide my supplemental heat lamp to the side to let it air out

what kind of wood is that?