I liked the concept a lot, but found that the keyboard input was a bit annoying. Namely, when you near miss your spot, because you can't back out, you have to end up dropping the package at the wrong slot. Other than that, it's quite a lot of fun, but there's this bug in which you get the correct sequence but it still tells you you didn't complete it correctly. 
Viewing post in Bobby boy jam comments
Hi,
the game is without sound and without sound effects.
I didn't have the time and patience to look for something.
I inform you that I have solved the defect you have reported to me. Also I added bobby's backward movement. In fact, moving backwards is more manageable.
Thanks for the advice.
Now I'm waiting for a response from the community on how the game updates.
Bye bye.
Finally played it again!! It's so much more fun to play with the ability to move backwards!! Thanks for changing that. The visuals are nicer now, and the colours seem easier to tell apart (although this may just be me knowing the game more). Also the score and feedback work perfectly now. Finally, thanks a bunch for the mention! Very nice of you!!