Hey! Thank you for playing and for your feedback. It's a sandbox but also I added a little challenge for those who need a goal in a game. You can destroy the red target blocks by shooting at them with arrows and if you manage to destroy all 10 you get a little "Thank you for playing" message. Sorry if this was not communicated well enough!
I can try making the jump timing on the slimes a bit more generous, thanks for pointing that out!