This game was a lot of fun. The leaderboard is great! The lava filling up the screen was a great touch. Occasionally you could get stuck a few times if the block wasn't aligned or if you dropped the block on your head. But then just picking the block up again fixed it. One thing that I think would be nice, would be to move the kind of block you're putting down closer to the player (or maybe have the player holding the kind of block he will put down). With the screen shaking and trying to jump around, it was hard to look across the screen to see which block you had selected. Other than that the game was pretty neat. Right when you run out of time it starts getting a bit repetitive, but I felt like the game loop was a good length. Great work!