Hey there,
thank you for supporting MAKERbuino and I am sorry for the problems that you’re experiencing.
You are putting way too much solder on your soldering joints. More importantly - there must be NO soldering bridges (the soldering joints must not be connected together with solder or the device will not work).
Please, go back to chapter #3 of the build guide (https://www.makerbuino.com/build-3/) and watch a couple of soldering tutorial videos.
Improve your joints a bit and return to me with a few better photos.
Don’t give up!
Sincerely,
Albert from MAKERbuino