Congratulations, L'alpha Lara!
You're very welcome to share links to your Decker projects in this forum. (That goes for everyone!)
I do second Millie's advice to upgrade Decker to the latest version. Skimming the release notes for intervening versions is a good idea; sometimes new revisions will require tweaks to old projects for compatibility reasons. If you're using any modules or contraptions in your project, you may need to upgrade those to their latest releases as well.
In general Web-Decker is somewhat slower than Native-Decker, especially when running on older computers. If you can be more specific about what you mean by "lagging" we might have some suggestions.