Filter games by lvl

This userscript can do that for you: SteamGifts v2 Giveaway Filter

Well, after I spend points into the group, wishlist, forum trains and massive GAs, I use search options like this because I'm still level 7.
http://www.steamgifts.com/giveaways/search?level_min=5&level_max=7

I use Extended Steamgifts which among many other features also lets you filter giveaways in any way you want when it comes to levels.

You can make it only show you level 1-4 giveaways, or level 2-5, etc.