We sell a variety of things, mainly particles. If you have any comments about bugs, malfunctions, lack of settings, etc., please contact me via twitter DM (@thirhnu11206) or message on Booth. We will be able to reply to you as soon as possible if you contact us on twitter, so please keep that in mind. We will update our products when we find bugs or malfunctions or on a whim, so it would be great if you could come back to check on us from time to time.