Ended the cave challenges Trophy in A Boy and His Blob

You may have noticed that every time you collect three treasure chests in any level, a new item will appear in your hideout. These are the challenge levels. Challenge levels are very short, but the downside is that there are no checkpoints – dying means starting from the beginning. Usually these will not pose a problem, but some will make you frustrated. Remember: these aren't timed, so go as slowly as you'd like to avoid making mistakes.

PurPleeHaze has made a YouTube walkthrough for these levels; find it HERE.