My biggest success is that the whole thing worked very well, everything worked and the 4th graders enjoyed our game. The entire game and its parts (sharks, gears, ping-pong balls) are fitted very well on the base.
My biggest obstacle/challenge was probably the gears. Some of them didn’t fit in space, some didn’t spin properly because of the uneven circle. It was really hard to spin them because of the force, so I had to fix the whole spinning thing (blue popsicle stick) on the side of the arcade.
One thing I’d like to change is the shooter (launcher). The 4th-grade kids were throwing the balls in the mouths because we thought it was hard for them to get the balls in. But turned out that they can easily just put the balls in because they could reach the mouths.
Another thing I’d like to change is the gears. The gears were not a complete and even circle, and that caused the “100 points” mouth to open for a long time because the gears didn’t interact with the other ones.