Yeah, sadly this game comes across as very uninteresting.
I think there is a right balance of introducing new features/mechanics and having the player fiddle with what has been presented so far, I think this game fails to achieve this balance.
First level feels like needless running through long corridors, they legit could be 25%-50% shorter in length and it wouldn't make a difference, the only variable being the geometry of your surroundings. Enemy variety is too low, encounters are too infrequent and the gameplay seems to be just kite backwards and shoot (which has the downside of creating more distance for your character to cover in order to get back to the point of farthest progress in the level so far.
Maybe it gets more interesting after the first level, unfortunately I lost interest and deleted my game before that.