Cool simple game, well done! Just the scaling on the tiles could be a little better :D
Played this on and off for about a week, got to 20128 and got a sort of game over screen just saying Climax!. did I beat the game? because I had too many empty squares on the previous turn to just lose.
I reached 3236 by only pressing right, up, left, down, in that order, over and over again. Can't get close to that kind of score if I try to think my way through it, probably because I'm bad at this kind of game. Seems pretty well done though.
1652 hahaha man I suck at this games
But there's something that really handicapped me and it was the game's colors. I'm colorblind and I know it's not usual for people to think about this kind of thing, but if the numbers had a small, black outline that would help me a lot!
I'm not blaming that for my score, tho. I'm just bad anyway XD