rocdminer has now been released on Google Play (for Android phones); please download it and enjoy. There has been a worrying increase in incidences of coal dust-related lung diseases over the last 20 years; the aim of the game is to highlight and reinforce the use of dust masks to help address this. The rocdminer app was created by CSM, University of Exeter as part of the EU Research Fund for Coal and Steel ROCD project #754205 , see http://emps.exeter.ac.uk/csm/rocd/
