My first review... Where should I start? I like the concept of this game and had fun playing it. The music is good, but I wish there would be more different music throughout the levels. At least I didn't get bored listening to the soundtrack and that is definitely a plus. The level design is good for what it is supposed to be and that's everything I need for such a game. Now about the gameplay. As I said: I had fun playing it and it was challenging... but not challenging enough. I got an A-rating or an A+-rating on every level (except level 12, where I got an A-) on the first try and I think that shouldn't be this way. After checking the titel again I am not quite sure if this is supposed to be... and if I should try to get A+ on all levels. Nonetheless that wouldn't change my opinion and the fact that I probably wouldn't play it again to get A+ on all levels. Also the control you had over the space was the same throughout all levels (You had to move the 'pillars' or avoid dangers by getting invincible) and I kinda hoped there would be more variation considering your direct influence on the level (Which parts of the level you control and such things. I have to admit though that I lack ideas for new elements.) To say so: The different elements you build into the level did quite a good job to compensate that. Last but not least - I died like three times on level 12, because I didn't expect those swingy-deathly things and had my problems to get used to their rhythm. After all that unexpected element made it better and a bit more challenging.
Conclusion: The game was well made, but needs more variation in different parts. I hope this was helpful, feeling a bit unsure about that wall of text.
That is awesome! Thank you Marimatsu! for taking time to give a review and a constructive one too. I'm actually starting to redesign the grading system just now after reading this and I'm planning to add more levels in the coming weeks.
No problem on the wall of text, it's definitely helpful.