Thanks for commenting, and wait for 1.3 Version it gonna be out with storyline and new monster :) probably gonna release it before the deadline. once again thank you.
and here is your questions answers:
1) Did i enjoy the jam? > Yes, absolutely ( it keep me motivated to work on this project)
2) Engine and How much time i spent in game dev? for this game I spent around 10 days in total and I used Unity Engine, also I have been developing 2D fun projects for last 2 years, but recently started to focus 3D game (mostly horror).