I got a bit frustrated in the regular mode but the strategy seemed to be to collect bread and ignore the walls and that worked well. ChillCore mode was actually kind of more difficult. Also the music didn't loop, I reached the end of the track so I played the last 2 levels of chillcore in silence :'(
Overall fun kind of flappy-bird like game but with a being-chased element to it. Reminds me a little less of jetpack joyride but using that kind of item-collect/upgrade model could be cool to help take this game to the next level conceptually.
I really enjoyed playing! It was simple, and I audibly cheered when I finally beat all the ChillCore levels. Cheers!