Your project is private so only you can see it to comment on it. Any footprint can be assigned to the top or the bottom layer. Select it on the PCB and then select the Layer attribute at the top of the right hand panel. For more information about how to get the best experience with EasyEDA including about layers and how to manage routing on them please study the Tutorial. * We strongly recommend that you follow the Design Flow and start all projects with the schematic.

Note that if you are looking to get JLCPCB to do PCB Assembly for you, they can only fit SMT components on one side, not both. There is no such restriction if you are assembling the PCB yourself.