Author here. The language has still many inconsistencies but not these ones.

Import functions is done the same way:

  func foo(a: Int): Int
  import func foo(Int): Int

The multiple declaration is consistent with assignment:

  var w, h = 640, 480
  w, h = 640, 680
  w, h = getBoundingBox(obj)

  var a = Int: 32

  var id = expr

  var a = Int32: 42
  var b = Uint8: 42

  println("The answer is \a", Float32: 42)

  var id: Type

Have you considered the syntax crystal uses i.e. 42_i32 and 42_u8?