I had the same issue. On the other hand, there is no cap on how many turrets you can have and your drop spot was always the same. Because of this I would just drop all my turrets near the same area where the core respawned. I would use the core to go and do something else like make another turret or charge the rocket and then fling it off screen to drop it right back in the middle of my turret nest. If I could add things, my list would be: pausing, some kind of barriers/terrain, more types of turrets, more types of enemies, shorter range on turrets(I had total screen domination from the middle), and maybe a bigger map size. If you went for bigger size and smaller range I would also add conduits or something of the like, something that would slowly or with increased cost send energy when in contact with the core(either placed by the player or as a map feature). If any or all of these were implemented I think that you could have a viable game release. I would recommend releasing it on mobile because it perfectly fits the pick up and dropping that can happen when you have a mobile device. I would honestly buy this if it were released. I loved this game and only wish their was more levels.