Something I don´t like is that you instantly lose your item, when getting the next one, so if you want to keep an item you need to avoid getting new ones.

I´d prefer to either keep your item even if you drove into an itembox, or something else that you can use in order to keep an item (like a second item screen, where you can see the item, you want to keep)
Switching may be complicated, but I guess this can be solved by using another button or so.

What do you think about this idea ?