Error of compilation #1

Hello. Cool pics! I fail to build game.

ringo@qwerty:~/Загрузки/AtariCentipedeGame-master$ gcc magic.c -lcurses -lmenu -lpanel -lpthread
magic.c: In function ‘CollisionCheck’:
magic.c:1005:13: error: ‘Sea_Mo’ undeclared (first use in this function)
(Sea_Mo nster[i].x == master_3_x && Sea_Monster[i].y == master_3_y) || (Sea_Monster[i].x == master_3_x + 1 && Sea_Monster[i].y == master_3_y) || (Sea_Monster[i].x == master_3_x + 2 && Sea_Monster[i].y == master_3_y))
^~~~~~
magic.c:1005:13: note: each undeclared identifier is reported only once for each function it appears in
magic.c:1005:20: error: expected ‘)’ before ‘nster’
(Sea_Mo nster[i].x == master_3_x && Sea_Monster[i].y == master_3_y) || (Sea_Monster[i].x == master_3_x + 1 && Sea_Monster[i].y == master_3_y) || (Sea_Monster[i].x == master_3_x + 2 && Sea_Monster[i].y == master_3_y))