The jumping physics are bad - things don't travel vertically at a constant speed because gravity is always applying an acceleration. This is what human brains are trained to expect, and if your game doesn't do it, players will get frustrated.
There was a crash that kept happening when jumping while touching a wall, and every time I pressed N to go to the next level. Hope this backtrace helps:
Exception in thread "LWJGL Application" java.lang.NullPointerException
at com.badlogic.gdx.math.Rectangle.setPosition(Rectangle.java:137)
at com.treehouseelite.ld28.thespians.Thespian.updateRectangle(Thespian.java:84)
at com.treehouseelite.ld28.thespians.Player.checkContainment(Player.java:342)
at com.treehouseelite.ld28.thespians.Player.update(Player.java:93)
at com.treehouseelite.ld28.screens.GameLevel.render(GameLevel.java:104)
at com.badlogic.gdx.Game.render(Game.java:46)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:207)
at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:114)