The combat, enemies and pacing of the unlocks are all great.
However there a lot of bugs like the freezing as other people have mentioned. I defeated the first stage once and had to fight the first stage guy a second time then that put me to the third stage. The upgrade menu still had prices on double jump after i had purchased it.
I puchased the stone sword but then the option to buy it was still there, so i clicked it and lost obs trying to buy it. Had to refresh before the shiny sword appeared and i bought that but still only had the stone sword and it said i bought all weapons.
The small enemies that spawn seem to freeze everytime you hit them im not sure if there stunned or if thats not meant to happen.
Its seems like it would be a really fun game can't wait for an update :)