Yes the "bomber" was made to fly over your tower blocks and explode on them on death in a big AOE or hit the base. Part of the issue rn is the game balance is kind of a mess because while implementing a new enemy and the new 2x2 tower upgrade I fixed a major bug in the game that totally changed the balance right before I submitted the final build that went live for the jam. Previously every 1x1 tower that was in existence was 2 towers stacked so I had to eyeball the figures with damage number changes etc and go with it, and seems I got a lot of things wrong in the process.