Next time set Cook All an Cook Maps Only in packaging settings so you don't bring birth to 11GB monster again :p
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Thanks for the advice ShadowriverUE4,
I did so after and outside the game-jam submission contest time frame.
For others sake, here's a link to a reduced 2GB uncompressed, 1 GB compressed version that I will overwrite the jam link once the jam has been judged/completed. Same game, reduced size.