OK, first off... I am SO BAD at skill-based games like Super Meat Boy, A Sister's Journey.... and, apparently, Waythed 2 LOL However, I still wanted to leave you feedback and put my absolute dislike of these types of games aside :-D
1. The music is so calming and relaxing... and then I died. But back to the music. So calm and... I died again. Relaxing music and then... death. OK, let's try again. Love this music... I f#@#$ died AGAIN! But the music. Good.
2. Controls are very well done. No issues here. You can definitely tell when you lose... it's on you and not the controls, which is good. Some skill games are hard because the controls suck. Your game is hard because I suck LOL
3. Artwork isn't bad, but I also think it could be improved. The diamonds are kind of plain, and the ball you control has a lot going on. However, this is definitely not an important category when you compare how well done everything else is.
4. Overall fun. So, this is tough for me to score, and I want to ensure I do it fairly. Overall, fun for me? Not at all. LOL I couldn't even get past the 3rd tutorial. Again... not because of your game's design or bad controls, but I just couldn't wrap my head around the timing. I was SO BAD at your game. BUT... I could see a LOT of people loving this, so I'm going to score it based on HOW I feel others will like it...
Anyway, great game, and I can tell it will do well for those who love a challenge. :-)