Wow just when I kept thinking "Okay this must be the end" the game just kept going and offering so much more content and new mechanics. The portal 2 influence is very clear and very well re-imagined for this title.
Let me just quickly pass over the negatives of the game (very few).
The sound mixing was weird. The character audio was really low but then the goblin audio was really high. It just felt a bit unbalanced in some places. It wasn't a huge issue or really soured my enjoyment of the game just made me think "huh the sound is a little weird". Especially when you hit the goblin with light and it goes "ooh" is it supposed to be entranced by the light or something? Haha.
Anyways the graphics were great, a little stale with the same environment used throughout but given it's a gamejam it's not unexpected. The character and goblin designs were cool and I liked how well communicated everything was with their obvious colours and shapes. I really enjoyed bouncing around and navigating the levels and the cauldron checkpoints were a great touch especially later when I died a few times. I felt like the alchemy/mixing mechanic was a little under used to be honest. It was a nice surprise but maybe having the game open with a similar one to get the light potion would have been cool.
Unlocking my own bouncing potion afterwards was really fun and opened things up a lot. It felt a little glitchy sometimes where the character wouldn't throw the potion for some reason but for the most part it worked great! I especially loved the velocity/bounce height mechanic you guys did, it worked really well.
I liked that you included some cut/unfinished stuff at the end showing the eventual red potion and speed mechanics. Again it's all very portal coded but there's nothing wrong with that.
Overall I had a really fun time with this game it would be nice to see where it goes if you decide to keep developing it after the jam and I'd love to revisit it if you do.