Indie side-scrollers are not uncommon but Leave Home is kept fresh by dynamic difficulty and the ability to split shots. A full playthrough lasts only five minutes--less in this demo--which makes for intense nuggets of fun.
You can buy Leave Home on PC direct from Hermit for $5 or on Xbox 360 for 240 Microsoft Points ($3). If the soundtrack takes your fancy, that's also on FileShack.
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YEEEEEEEAAAAAAAAAAAHHHHHHHHHHHHHH!!!!!!!!!!!