Otherwise nice, but difficulty ramps up quite slowly. I got 51 points. At that point purple diamonds started appearing and I just couldn't remember what I should've done (I remembered it right after the fact). Didn't feel like playing from start again... Suggestions: Start with slow speed to better introduce new mechanics (so that one can see at least once what the mechanic is). Have tempo rise a bit towards level 50 and then again slow with every new mechanic.