GR:Cubetractor is a 16-bit action-puzzler that's simple enough, stylistically and mechanically, to have been released as a console game in the mid-'90s. That's how it gets you. It has a two-button control scheme that can be mastered in seconds, and it's almost entirely unburdened by a story, barring a few conversations here and there in which characters use silly, made-up words like "hrubs" and "waesomes." It's unintimidating, which makes its remarkable depth and often grueling difficulty all the more startling. It lulls you in with its old-school charm and then promptly makes a mess out of you, in very satisfying ways. One of the cutest games in quite some time is also one of the most brutal.