Blob Survival Defense

This is my first game ever. It's a simple game made for pirate game jam 14, unfortunately I didn't have enough time to finish it and add more upgrades and sounds so it's pretty basic and boring but the general idea is there.  My kids (age 7 and 9) made the blob sprites + animations .

The goal is to survive as long as possible, think you can make it to 2 minutes?