Hi! Thanks for your feedback!
An uploaded game build doesn't have items to collect. Actually, we've implemented items dropping by slaying enemies. However, we've encountered numerous errors we couldn't solve in time. Therefore, we had to cut a large part of code, so the game could run without accidentally exiting :)
As for the gameplay, there are lots of things to work on. I hope we would be able to polish every side of it by the next OGA :)