Thank you for the accurate feedback!
I have fixed the keys, but I can't upload a new version until the voting of the jam will be completed.
I will definitely upload a fixed version later.
I totally agree about testing, and outside of the jam, I always ask for feedback.
It definitely makes a difference between hook players or lose them straight away!
Different enemies will be added for sure, I had a bunch of them on the paper, but didn't have time to build them. I was actually lucky enough to have uploaded a "working" game. I have definitely added too many features considering that I worked on the game for a total of 25 hours only :D
About the grenades, some don't explode for a while due to a bug, need to fix that part.
Aside for that, I tried to find a good timing between let them explode quickly and give them time to bounce down some eventual holes the player might want to clear.
Once again, testing here will help :)
I like co-op games and I think too this has good potential.
I just need to decide the direction to give to this game:
a) Rushing quick action where players are forced to move to the end of the level.
b) Exploration and use strategy to defeat enemies using synergy between players.
It could be too to have some levels in one way and others in the other way and let players decide which mission to choose between the two, maybe changing the story and so on.
Thank you again for your great feedback!