Hey @Kordanor, many thanks for playing our game. You're right, there seems to be a window where the cooldown mechanic locks up, thanks for pointing that out to us.
Sorry about the invisible walls bug, it was due to dead enemies leaving their tile blocked on reload after save. This caught a lot people out and was actually working until close to the end of the jam where we decided to try to remove dead enemy graphics, instead of just leaving them there, and we missed out a line of code to clear the tile (so annoying but mistakes are easy to make). This was our first attempt at a Load/Save feature and we did it because the game play was easily over an hour and we didn't want people to have to restart from the beginning each time. We've learned a lot about what works, and what doesn't work, doing this jam, which is great for our game development journey.
If you do get stuck again, and you're playing on Windows, we can edit your game save to fix it for you so you can continue. Feel free to DM @Arlorean on Discord for this.
We've already fixed this, and many other things pointed out to us (by people reviewing the game), for a post-jam update. Hopefully we might even go on to make a commercial version of this too (free Steam key for you of course Mr Judge😊).