That's weird. The local button should be enabled if you have a gamepad connected.
Did you and your brother create a network with Hamachi? Did the client copy the IPv4 address from the host and paste in the game? The first time you host a game the firewall might ask you to allow it. Did that happen?
And if you skip Hamachi and instead set up port forwarding in the router and then use your normal ip found on https://www.whatismyip.com/ ?
Also found this bug:
___________________________________________
############################################################################################
ERROR in
action number 1
of Step Event2
for object WaveSpawner:
Data structure with index does not exist.
at gml_Object_WaveSpawner_Step_2
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Object_WaveSpawner_Step_2 (line -1)
which crashes the game (it has happened to me twice)
This error too (lol):
___________________________________________
############################################################################################
ERROR in
action number 1
of Step Event0
for object obj_electricBalloon:
Data structure with index does not exist.
at gml_Object_obj_electricBalloon_Step_0
############################################################################################
--------------------------------------------------------------------------------------------
stack frame is
gml_Object_obj_electricBalloon_Step_0 (line -1)