This plugin seems to be almost a duplicate of BuddyPress Album By The BP-Media Team. I haven't looked at the Photos+tags plugin I but I do notice that BP-Media was involved in that one as well, so the BuddyPress Album and Photos+tags could be very similar.
If BuddyPress Album is activated on the site, a fatal error will occur if you attempt to activate this plugin. The same coding is involved and therefore an attempt to declare the same function happens and kills the activation of this plugin. At least, rename the function(s) to avoid fatal errors. An idea might be to put a check to see if BuddyPress Album or Photos+Tags is active and let people know there is a potential for fatal errors. I personally would include the function_exists() option to avoid those nasty fatal errors if you are going to keep the same function code.
Then, the options for images do not work. Attempting to edit or delete images or galleries does nothing. I haven't found out how to tag anything yet.
Also, when viewing images from a gallery, it would be nice to allow for clicking to close image and provide navigation to move to the next image, rather than having to hit the back button in the browser.
Basically, there is a lot that needs to be done before this plugin is ready for an active site.
I do hope you will continue with the project and make this plugin fully functional. However, the suggestion that people send you money to encourage you to continue with the project is a little premature, from my perspective. You have copied almost exactly the bp-album plugin and haven't provided the functionality your description suggests yet.
Great start though.. keep going with it.