There are some definite issues/quirks with the mix of real numbers for physics and the discrete world of MakeCode Arcade’s tile maps and sprites. This example with maze navigation is frustrating and I suspect it’ll prove difficult to explain this behaviour to children.
I’ve put together some other tests which test things that are currently ok and highlight some problems with a 16x16 sprite passing a 16 wide gap slowly with acceleration toward that gap, see Physics engine tests?. Those might be useful to verify any changes made don’t alter desirable/current behaviour and to see what they do in terms of improving gap passing.