Yes, I was very much surprised by EXCELent Rogue.
Excel as a platform has it's flows and problems, but overall it is playable.
But! It looks like the game is not really balanced.
And it's that kind of unbalanciness where you start very easy, but over time the game become frustratingly hard.
When the game is far from being balanced, I personally prefer when it's vice versa.
Hard at start, so it doesn't take much time to start over, but become easier as your character become more powerful.