At first I found the mining a bit fiddly because sometimes there would be just a small bit of ground left that impeded my progress. However, after I got the first upgrade it was much better. Maybe I just figured out how to do it right. In any case, it was rather relaxing digging around to find precious minerals, and I like that you gave him what amounted to a mini jet pack to help with getting out of precarious situations. Also, the ending was pretty cute.