Thank you! :)
The current iteration is really challenging for sure. One good strategy we discovered while testing was to space out the towers across the map into 3 chokepoints (giving yourself more time to react) and to group them by element (reducing cognitive load). There's one more level after the first one if you'd like to give it another shot.
We've thought about continuing the project beyond the jam and have talked about different ways the difficulty could be addressed. Some were planned for the jam build but didn't make the cut.