No bugs, design wise.. hmmm.. I think the area was a bit crowded with obstacles - it would be good to have some time to get familiar with the game's pace on an easier level and them gradually move to more difficult ones. But since you pulled it off in 7 days I think you made as good design as it can get ;) orbs were clearly visible, humming was indicating where they are/when they spawn, UI was visible and did not require to take my focus off the main gameplay... really well done!