Good effort. The panned bass effect is intriguing and probably most appropriate for the intro and break, but then needs to be solidified into mono during the main stretches, with perhaps a switch briefly/periodically. As others said, add another pad or lead element or two for some more texture. Maybe even play with the siren a bit more (panning, filtering and/or others). Probably don't want to get wild with any extras based on the vibe, but just some variety, space, etc.