Some clever ideas in there -- I especially appreciated the fact that the chromatic aberration was not just a stylistic decision to make it feel "hacker-ish", but actually fed in into the mechanics.
I think that there's more that could have been in two areas:
(1) Depth of mechanics beyond "lock and key". Perhaps that would 2d metaphors for file copying, viruses/trojans, data corruption, etc. 90s hacker films are endless source of strange and wonderful ideas of what hacking would be like in the 21st century.
(2) I would have loved to see a stronger connection to the theme of "joined together" beyond theming of combining the abstract cubes. Maybe it would be the connection of computer systems together or piecing together scraps of data to uncover a secret, etc.
A great first jam entry - best of luck!