I ended up playing this for an hour straight, it's pretty addictive. Making such a fully fledged and polished game in such a short time period is amazing. The little changes from you ordinary tower defense did make the storm slightly more chaotic, for example not being able to change targeting.
It definitely does take some time to figure out what works and what doesn't, I had to try 4-5 times before being able to get past wave 4, but then later on I felt invincible, so it seems that the balancing might need a little work. Otherwise a great game, good job!
P.S. The interest system is also something I haven't seen so far in this genre and it made me reconsider my decisions in the calm phase.