This one got me for a loop. It just so happens that both the h2 browser AND the play app should run from the same console. Otherwise, you end up running app and its database as one instance and new instance of ‘a’ database in another instance.
Do as I say and not as I do!
1. From shell, start play app. Do NOT type ‘play run’, just ‘play’.
2. Type ‘h2-browser’ next, The H2 Console should load up in the browser.
3. Now, type ‘run’ (or ‘~run’ for compile on save) to start your app.
Bingo! You should be able to now see your database.