A really cool concept! I only got to stage 9 as once all the mechanics started to stack on eathover it got a bit overwhelming. The wall jump manoeuvre is a bit too hard to pull off with a keyboard, meaning I had to switch to a controller halfway through, and even then, it was difficult. I feel the experience would have been better if you stuck to the really cool sand building mechanic. I also may have found a bug where the wave does not come out again on stage 9. But, even with those issues, it is really fun, and I would definitely play an expanded version.